Elimination Diet Protocol for Dogs: The Complete UK Guide

By Gary, founder of Pet Allergy Scanner. 7+ years managing pet food allergies with my Cockapoo.

I earn a small commission from purchases through affiliate links in this article. This helps maintain the free scanner tool and costs you nothing extra.

Last Updated: May 2026

An elimination diet for dogs is an 8–12 week diagnostic trial in which a vet puts the dog on a single novel protein (one the dog has never eaten) or a hydrolysed prescription diet, with no treats, table scraps, or flavoured medications during the trial. Veterinary dermatology literature treats it as the most reliable way to confirm a food allergy in dogs (Mueller et al., BMC Vet Res 2016). Symptoms typically begin to clear from weeks 4–8; full assessment is usually at week 12. Suspected triggers are then reintroduced one at a time under the vet's guidance.

Quick Summary

• The elimination diet is the diagnostic standard for food allergy in dogs. Mueller, Olivry & Prélaud (BMC Vet Res 2016) and the American College of Veterinary Dermatology both name it as the most reliable method, well above blood, saliva and hair tests
• Two protocols vets in the UK commonly run: (1) a single novel protein (one your dog has never eaten — typically venison, duck, rabbit or kangaroo) paired with a single novel carbohydrate, or (2) a hydrolysed prescription diet such as Royal Canin Anallergenic, Royal Canin Hypoallergenic HP or Hill's Prescription Diet z/d
• The trial typically runs 8–12 weeks of strict adherence, followed by a structured reintroduction (challenge) phase. Anything less than 8 weeks is widely reported as too short to draw conclusions; the elimination phase is set up for failure if any allergen exposure happens during the trial
• The most common reasons UK trials fail: flavoured heartworm or flea chewables, dental treats, training rewards from another household member, scavenging on walks, and "limited ingredient" foods that still contain hidden poultry, beef or dairy fractions
• Free tool: use the Pet Allergy Scanner to verify any UK pet food contains only the proteins your vet has approved for the trial

This is the long-form, UK-focused walk-through. For a tighter owner-style overview, see the shorter dog elimination diet guide. The two articles share the diagnostic principles but this one carries more depth on UK food choices, vet protocols, edge cases, and the reintroduction phase. Either way, the elimination diet is a vet-led process — confirm every choice in this guide with yours before starting.

Quick Answer: A canine elimination diet is a vet-supervised diagnostic protocol that feeds a single novel protein (or hydrolysed diet) for 8–12 weeks with strict avoidance of all other food, treats and flavoured medications. If symptoms — chronic itching, recurring ear infections, paw licking, soft stools — improve substantially during the elimination phase and return on reintroduction of a specific protein, that protein is identified as a trigger. The protocol is treated as the diagnostic standard in UK and US veterinary dermatology (Mueller et al., 2016; Olivry et al., 2015). Run only with your vet; any deviation during the trial is widely reported to invalidate the result.

Table of Contents

• What Is an Elimination Diet — and Why Vets Prefer It
• How Strong Is the Evidence?
• Who Should Run an Elimination Trial?
• Choosing a Protocol with Your Vet
• Pre-Trial Setup (Week 0)
• The 8–12 Week Elimination Phase
• The Reintroduction (Challenge) Phase
• Why UK Trials Most Commonly Fail
• What Happens If the Trial Doesn't Work
• Long-Term Management After Diagnosis
• Honest Take
• Sources & Further Reading
• Related Articles
• Frequently Asked Questions

What Is an Elimination Diet — and Why Vets Prefer It

An elimination diet trial (sometimes shortened to EDT or "diet trial") is a structured feeding protocol designed to do two things in sequence: first, remove every food protein that could be driving the dog's symptoms; second, after symptoms improve, methodically reintroduce candidate proteins one at a time to identify which one (or several) trigger a reaction.

The mechanism the vet is testing is immunological. A food allergy in dogs is an IgE- or cell-mediated immune response to a specific food protein — most commonly chicken, beef or dairy according to the case-series synthesis in Mueller et al. (BMC Vet Res 2016). Removing the trigger should produce visible improvement in the symptoms the immune response was driving (skin, ear, gastrointestinal). Reintroducing it should produce a recognisable flare. The diet trial is functioning as a clinical experiment with the dog's own body as the test bed.

Vets prefer this approach over blood, saliva or hair tests for two reasons that come up consistently in the dermatology literature:

1. Specificity. A diet trial that produces a clear improvement-then-flare pattern is direct behavioural evidence that a specific protein triggers a reaction in this specific dog. Lab tests measure markers that correlate with allergy in the population, not in the individual.

2. Reliability. Independent comparisons of canine serum IgE and saliva tests have repeatedly reported high false-positive rates — they often flag substances the dog has never eaten or tolerates fine. Hair-based "intolerance" tests sold direct-to-consumer have been particularly poorly validated. Coyner & Schick (2019) and earlier reviews in Veterinary Dermatology lay this out at length. Independent commentary from the BVA (British Veterinary Association) has cautioned UK owners about the limits of these tests.

The result is that elimination diet trials remain the diagnostic backbone of canine food allergy work in both the UK and US — not because they are convenient (they're not) but because they're the most informative tool available.

How Strong Is the Evidence?

The strongest single source many vets cite is Mueller, Olivry & Prélaud, "Critically appraised topic on adverse food reactions of companion animals (2): common food allergen sources in dogs and cats" (BMC Veterinary Research, 2016) — a meta-synthesis of case-series data identifying the most commonly reported food allergens (beef, dairy, chicken, wheat, lamb in the case series studied) and reaffirming the elimination diet as the diagnostic standard.

Earlier work by Olivry, Mueller & Prélaud (2015) reviewed elimination-diet trial designs and reported that diets containing fewer protein sources, longer durations (8 weeks minimum, often 12), and stricter adherence produced the most diagnostically useful results. The European College of Veterinary Dermatology (ECVD) and the American College of Veterinary Dermatology (ACVD) both publish owner-facing materials reflecting the same protocol.

In the UK specifically, Verlinden et al. (2006) in Critical Reviews in Food Science and Nutrition summarised the diagnostic and management approach used in European veterinary practice, and the same general protocol has remained the consensus since.

What this body of literature does not promise is that every individual dog will respond clearly within 8–12 weeks, or that lab tests will eventually catch up to diet trials in reliability. Both questions are still active research areas. What it does say is that, today, the elimination diet is the most reliable test we have, and your vet using it as the primary diagnostic tool reflects current best practice rather than tradition.

Who Should Run an Elimination Trial?

Not every itchy dog is a food-allergy candidate. The dogs vets typically discuss elimination trials with are those whose symptoms match the food-allergy pattern reported in the literature:

• Year-round symptoms — no seasonal pattern. Environmental allergies (atopic dermatitis) typically flare in spring/summer/autumn with pollen cycles; food allergy is consistent across the year
• Multi-system involvement — itching plus recurring ear infections, plus paw licking, plus sometimes GI signs. Food allergy is one of the conditions that affects skin, ears and gut simultaneously
• Symptoms have not responded to typical first-line treatments — antihistamines, short steroid courses, parasite control all considered and addressed
• The dog's age fits the profile — most canine food allergies are reported to begin between 1 and 5 years of age, though late-onset cases are described

Conditions that mimic food allergy and should be ruled out first (or at least flagged) before starting a trial include atopic dermatitis (environmental), flea allergy dermatitis, parasitic infestations (sarcoptic mange, demodex), endocrine conditions (hypothyroidism, Cushing's), and — particularly in some breeds — exocrine pancreatic insufficiency (EPI) or inflammatory bowel disease (IBD). Your vet decides which of these need investigating before the trial begins.

Take action today: Use the free Pet Allergy Scanner to check whether your current food contains any of the proteins your vet wants to exclude from the trial.

Choosing a Protocol with Your Vet

The two main protocols vets in the UK run are the novel protein approach and the hydrolysed prescription approach. Some dogs are also placed on home-prepared elimination diets, but these are less common and require careful nutritional balancing — your vet will only recommend this if they believe it suits your circumstances and they can support the formulation.

Novel Protein + Novel Carbohydrate

A novel protein is one the dog has never eaten before. Working with your vet, you write down everything the dog has historically eaten — including treats, table scraps, training rewards, and dental chews — and then choose a protein from outside that list.

Common novel proteins in UK practice: venison, duck, rabbit, kangaroo, horse, fish (specific species the dog has not eaten before — for example, hake, trout or salmon depending on history). Less commonly: ostrich, alligator. Insect protein (black soldier fly larvae, cricket) has emerged as a genuinely novel option in some UK and European limited-ingredient lines.

Common novel carbohydrates: sweet potato, pumpkin, peas, quinoa, tapioca. The principle is the same — pick something outside the historical diet.

UK retail options that have served as novel-protein elimination foods for some owners (always check the full ingredient panel and confirm with your vet, because exact recipes change):

• Acana Singles — single-protein limited-ingredient options including duck and lamb, available at Pets at Home UK and specialist retailers
• Natural Balance L.I.D. Duck & Potato — single-protein duck formula, available via Amazon UK
• Wellness Simple LID Salmon — fish-based limited-ingredient diet, available via Amazon UK
• Zignature Kangaroo — exotic novel protein, limited UK availability via Amazon UK import

Burns and James Wellbeloved both make UK-staple single-protein recipes (typically turkey, fish, duck, lamb) that some UK vets approve for elimination work. Confirm with your vet whether the specific recipe meets the elimination criteria for your dog's history.

Hydrolysed Prescription Diet

Hydrolysed protein diets break the source protein into peptides small enough that, in published case series, the immune system most often does not recognise them as the original protein. Vets reach for these when:

• The dog has eaten so many proteins historically that finding a genuinely novel option is impossible
• Multiple proteins are suspected as triggers
• A previous novel-protein trial has failed and the vet wants a more controlled second attempt
• Strict compliance is going to be hard (multi-dog household, child-handler) — the hydrolysed diet is more forgiving of incidental exposure than a novel-protein trial, though strict compliance is still required

Hydrolysed options UK vets commonly prescribe:

• Royal Canin Hypoallergenic HP — hydrolysed soy. Widely stocked at UK vets and Pets at Home Vets (prescription required)
• Hill's Prescription Diet z/d — hydrolysed chicken liver. Same UK distribution
• Royal Canin Anallergenic — ultra-hydrolysed (free amino acids and very low molecular weight peptides). Used when HP has failed
• Purina Pro Plan Veterinary Diets HA Hypoallergenic — hydrolysed soy, expanding UK distribution
• Specific Dermatology FΩD-HY — hydrolysed salmon, available in some UK practices

For a deeper breakdown of when vets consider novel protein versus hydrolysed, see the novel protein vs hydrolysed diet comparison.

Decision Factors That Come Up in Vet Conversations

| Factor | Novel Protein | Hydrolysed Prescription | |---|---|---| | Cost | Lower — typical UK retail or premium DTC | Higher — typically £60–80 for 10 kg+ bags | | Availability | UK retail + Amazon UK | UK vets + Pets at Home Vets, prescription required | | Strict-compliance requirement | Very high (any unrecognised protein restarts the clock) | High (but slightly more forgiving on accidental exposure) | | Best when… | Dog has a clear, narrow feeding history | Dog has eaten widely or has multi-protein suspicion |

Pre-Trial Setup (Week 0)

The week before the trial starts is more important than most owners realise. Vets I've seen describe this prep window as where most failures begin.

Confirm the protocol with your vet. Get the specific food name, brand, recipe variant, and approved treats (if any) in writing. If the vet has approved a hydrolysed diet, get the prescription and source the food before the start date.

Audit and remove all unapproved food sources. Every treat, dental chew, rawhide, training reward, leftover meal in the fridge, dropped-food location under the table, the dog's tendency to scavenge on walks. The simpler approach is: anything that isn't the elimination diet leaves the house for 12 weeks.

Switch flavoured medications. This is one of the most frequently flagged failure modes in UK practice. Many heartworm preventatives (less common in the UK, but relevant for travel), flea/tick chewables (Bravecto, NexGard, Simparica), and dental products contain chicken, beef or pork flavouring. Your vet will switch these to spot-on or unflavoured oral alternatives for the trial period. Confirm every product the dog regularly receives.

Brief everyone in the household and the dog's regular handlers. This includes family members, dog walkers, daycare/boarding staff, neighbours who give treats over the fence, and visitors. Print a one-page summary if it helps — what the dog can eat, what they can't, what to do if accidental exposure happens.

Set up the symptom diary. A simple spreadsheet or notebook with daily ratings (0–10) for itching, ear condition, paw licking, skin condition, and stool quality. Owners who keep diaries can tell whether week 6 looks better than week 2; owners who don't, can't.

Buy a 12-week supply. This avoids the temptation to switch recipes mid-trial when stock runs out, and protects against any retail-level recipe change happening mid-trial.

The 8–12 Week Elimination Phase

The phase itself is conceptually simple — feed only the agreed diet — and operationally hard.

Week-by-Week Pattern Reported by Owners and Vets

This is the general shape; individual dogs vary. For a more detailed week-by-week walk-through, see the elimination diet week-by-week protocol guide.

| Weeks | What Owners Often Report | |---|---| | 1–2 | Little visible change. Some dogs initially refuse the new food and need a slow transition. Others have a brief soft-stool or gas adjustment as the gut adapts | | 3–4 | Digestive symptoms (where present) usually start improving first. Stools firmer, less gas. Ear discharge may begin reducing | | 5–8 | The window in which most reported skin and ear improvement appears. Itching reduces, paw licking decreases, fewer hot spots, ears stay clearer. Coat condition starts improving in the second half of this window | | 9–12 | Improvement typically plateaus. The vet will assess at week 8 or 12 and decide whether to begin reintroduction |

If there is no improvement at all by week 8, the vet will usually pause and reassess. Possible reasons include: the dog isn't food-allergic (environmental allergy or another condition is the actual driver), accidental allergen exposure during the trial, or the chosen protein isn't actually novel for this dog.

Strict Compliance: What "Strict" Actually Means

Strict adherence is non-negotiable. Vets routinely emphasise that "just one treat" can sabotage the entire trial because food-protein-driven inflammation can take 2–3 weeks to resolve after exposure, effectively restarting the diagnostic clock.

What strict means in practice during a UK trial:

• No treats — including dental chews, rawhide, antlers if they've been flavoured or processed with allergen contact
• No table scraps — full stop, even from another household member who "just wanted to be nice"
• No flavoured medications — confirmed with your vet for every product the dog regularly receives
• No flavoured toothpaste — switch to plain water brushing or vet-approved toothpaste with no allergen ingredients
• Supervised walks where scavenging is a risk — particularly in parks where other dogs are fed treats and food is dropped
• Care at family homes / dog walkers — a quick "I gave him a piece of chicken" undoes weeks of work
• Beware of "limited ingredient" or "sensitive skin" foods that aren't the prescribed elimination diet — many contain chicken fat, animal-fat-derived flavouring, or chicken-derived "natural flavours"

If accidental exposure happens, tell the vet. Most won't restart from zero unless the exposure was substantial — but they will adjust the timeline and the assessment date. For the broader rules around what can and can't go in the bowl during the trial, see elimination diet treats during trial.

The Reintroduction (Challenge) Phase

If symptoms have substantially improved during the elimination phase, the vet will move to reintroduction — also called the challenge phase. This is where the diagnostic information actually comes from. The elimination phase tells you something is in the diet; the challenge phase tells you what.

The Pattern Vets Typically Use

The standard approach is to add one suspected protein at a time, fed for a defined period (often 1–2 weeks, sometimes longer), while continuing the elimination diet base. The vet watches for symptom return.

Common reintroduction order described in UK practice:

1. Start with the protein the owner most wants to confirm (often chicken — the most-reported trigger in case series)
2. Beef, then dairy
3. Wheat, soy, egg
4. Less common proteins (lamb, fish if not already in the elimination diet, pork, etc.)

If a protein triggers a clear flare-up — itching returns, ears flare, GI signs reappear — the vet documents that protein as a trigger, removes it, waits for symptoms to settle back to baseline (often 2–3 weeks), then proceeds to the next test protein.

If there is no flare-up after the agreed test window, that protein is documented as tolerated and the next protein is tested.

Why Some Vets Skip Reintroduction

A subset of vets and owners stop after the elimination phase confirms food is involved, without doing a full reintroduction sequence — particularly when the dog's symptoms are severe, multiple proteins are suspected, or the owner doesn't want to risk repeated flares. In these cases the elimination diet effectively becomes the long-term diet.

The trade-off is: skipping reintroduction means you don't know which specific proteins are triggers, only that the elimination diet works. That's fine practically (the dog stays on the diet long-term) but limits future flexibility around treats, recipe changes, or alternative foods. Your vet will discuss the reintroduction-or-not decision with you.

For the detail of how to run reintroduction safely once the elimination phase is finished, see reintroducing foods after an elimination diet.

Why UK Trials Most Commonly Fail

Drawing on the patterns vets describe and what UK forums report, the main failure modes are:

1. Flavoured chewables. Bravecto, Simparica Trio, NexGard, and similar UK-prescribed parasite control products. These contain chicken, beef, pork or fish flavouring. Switching to spot-on alternatives during the trial removes the issue.

2. Family or visitor "just one treat" exposure. Children, elderly relatives, well-meaning neighbours. The trial works only if everyone with food access understands the strict rule.

3. Limited-ingredient food that wasn't actually limited. UK shelves carry plenty of "sensitive skin" or "hypoallergenic" recipes that contain chicken fat, "animal fat" (unspecified), or "natural flavouring" (often poultry-derived). The label phrase doesn't guarantee the food is suitable for an elimination trial. Always read the full ingredient panel and confirm with your vet.

4. Cross-contamination at multi-dog households. If another dog in the home eats a regular diet, the elimination dog can pick up food from the bowl, scavenge in the kitchen, or share treats. UK households with multiple dogs sometimes need to feed the elimination dog separately or move all dogs onto the same elimination food during the trial.

5. Stopping the trial too early. Owners who don't see improvement at week 4 sometimes give up. Vet dermatology literature describes weeks 6–8 as the typical window where improvement appears; quitting at week 4 misses the diagnostic window.

6. Walks and scavenging. UK parks, picnic areas, and pavements where other people drop food. Long-line, no-pavement-eating training, and a watchful eye are part of the trial.

For a deeper breakdown of these failure modes, see why elimination diets fail in dogs and what to try next.

What Happens If the Trial Doesn't Work

If symptoms haven't improved by week 8–12 on a strict trial, the vet's next steps usually involve:

1. Confirming compliance. Retracing the trial week by week to check for any allergen exposure. This often surfaces a flavoured medication or visiting-family-member event the owner didn't flag at the time.
2. Switching protocol. Moving from a novel-protein diet to a hydrolysed prescription, or vice versa. Some dogs that don't respond to one approach respond to the other.
3. Investigating non-food drivers. Atopic dermatitis (environmental), flea allergy dermatitis, mange, secondary infections, or an endocrine condition driving the skin signs. The vet may run further diagnostics — skin scrapes, blood panels, intradermal testing.
4. Trial of immunomodulator medications. Apoquel, Cytopoint, or short-term ciclosporin while underlying drivers are investigated. These don't fix the cause but reduce the dog's discomfort during the diagnostic process.

A small subset of itchy dogs do not have an identifiable single cause and end up on a long-term combination of dietary management and medication. That outcome is part of the dermatology landscape — your vet will navigate it with you.

Long-Term Management After Diagnosis

If the elimination trial successfully identifies one or more triggers, long-term management is conceptually simple: avoid the triggers permanently. In practice, that means:

• A long-term commercial diet that genuinely excludes the trigger(s). This may be one of the limited-ingredient diets used in the trial, a different LID, or a hydrolysed Rx diet kept on long-term
• A treat strategy that fits the diet. Single-ingredient freeze-dried treats matching the safe protein, or kibble pieces of the safe diet used as training rewards
• Continued vigilance on hidden ingredients. Recipe changes happen — what was safe a year ago may not be safe today after a manufacturer reformulation. Read the panel each time you re-buy
• Supplement support if your vet recommends it. Omega-3s, probiotics, and skin-barrier-supporting supplements come up in vet conversations after an elimination diet identifies the trigger. Specifics are a vet decision; see the food allergy supplements guide for owner context

Most dogs that successfully complete an elimination trial and stick to a clean long-term diet remain symptom-free, though occasional flares from hidden exposure or new sensitivities developing over time are reported.

Honest Take

The elimination diet is the part of food-allergy work that owners most often underestimate. The mechanics aren't complicated — feed one thing, watch what happens, reintroduce one thing at a time — but the discipline required for 8–12 weeks of strict adherence in a real UK household with kids, family visits, dog walkers, and a Cockapoo who can find a dropped chip from across the room is significant.

When my vet ran our Cockapoo's first elimination trial, the failure point at week 5 was a flavoured Bravecto chewable I hadn't thought to flag. The vet had warned me about heartworm preventatives — which we don't use — but didn't get specific about flea/tick treatments because she assumed I'd connect the dots. I didn't. Two weeks later, after switching to a spot-on, the inflammation cleared and the trial actually started working from there. The protocol is sound; the thing that breaks it is how easy it is to miss one channel of allergen exposure.

If you're starting an elimination trial: take the prep week seriously, brief everyone, and expect to find one or two exposure routes you hadn't thought of. The trial is doing real diagnostic work — give it the conditions to actually work.

Sources & Further Reading

• Mueller, Olivry & Prélaud (BMC Veterinary Research, 2016) — "Critically appraised topic on adverse food reactions of companion animals (2): common food allergen sources in dogs and cats"
• Olivry, Mueller & Prélaud (BMC Veterinary Research, 2015) — "Critically appraised topic on adverse food reactions of companion animals (1): duration of elimination diets"
• American College of Veterinary Dermatology (ACVD) — owner-facing materials on canine food allergy and elimination diets
• European College of Veterinary Dermatology (ECVD) — current European veterinary dermatology guidance
• British Veterinary Association (BVA) — Pet allergy testing position — UK veterinary commentary on the limits of pet food allergy testing
• Merck Veterinary Manual — Food Allergy in Dogs — reference protocol for elimination trials

Related Articles

• Dog Elimination Diet: 8-12 Week Owner's Guide — the shorter quick walk-through version
• Elimination Diet Week-by-Week Protocol
• Elimination Diet Treats: What's Allowed During the Trial
• Reintroducing Foods After an Elimination Diet
• Elimination Diet Failed — What's Next
• Novel Protein vs Hydrolysed Prescription Diet
• Best Hypoallergenic Dog Foods (UK + US)
• Dog Food Allergy Symptoms: Complete Guide

Ready to check your dog's food? Use the free Pet Allergy Scanner to verify any UK or international pet food contains only the proteins your vet has approved for the trial.

Frequently Asked Questions

How Long Does an Elimination Diet Trial Take in Dogs?

Most UK vets run 8–12 week trials. Veterinary dermatology literature (Olivry et al., 2015) describes 8 weeks as the minimum for skin symptoms to show meaningful improvement; 12 weeks is the upper end most vets use before assessing. Reintroduction adds another 1–4 weeks per protein tested, so a complete trial-plus-reintroduction sequence often runs 3–5 months in total. Your vet sets the specific timeline.

Can I Run an Elimination Diet Without My Vet?

Vets routinely advise against running a trial without veterinary input. The reason isn't gatekeeping — it's that the trial only produces useful information if the diet is genuinely free of trigger proteins, the protocol is run correctly, and conditions that mimic food allergy (parasites, environmental allergies, endocrine disease) have been reasonably ruled out first. Owners who DIY trials often draw the wrong conclusions because one of those conditions wasn't addressed. Talk to your vet first.

What's the Difference Between Elimination Diet and Hydrolysed Diet?

A novel-protein elimination diet uses a single protein the dog has never eaten. A hydrolysed prescription diet uses a protein that has been broken down (hydrolysed) into peptides too small for the immune system to recognise as the original protein. Both can serve as elimination diet bases — your vet decides which one suits your dog's history, your household compliance, and your budget. See the novel protein vs hydrolysed comparison for the practical trade-offs.

Can I Use a Limited Ingredient Diet from the Pet Shop Instead?

Some over-the-counter limited-ingredient diets are suitable as an elimination diet base, but only if (a) your vet has reviewed the full ingredient panel and confirmed it meets the elimination criteria for your dog's specific history, and (b) the recipe is genuinely limited — many "limited ingredient" foods on UK shelves contain hidden chicken fat, "animal fat", or "natural flavouring" that fail the elimination test. Don't assume the marketing label matches the formulation.

Will My Dog's Symptoms Definitely Clear Up?

Not always. A successful elimination trial that produces clear improvement during the elimination phase and a recognisable flare on reintroduction confirms food allergy. But not all itchy dogs have food allergy — environmental allergies, atopic dermatitis, parasites, and other drivers all produce similar surface signs. If a properly run trial doesn't produce improvement, that's diagnostic information too: it argues against food being the primary driver, and the vet will pivot to investigating other causes.

How Much Does an Elimination Diet Cost in the UK?

Costs vary widely. A novel-protein retail diet (Acana Singles, James Wellbeloved single-protein, Wellness Simple) typically runs £40–80 per month for a medium dog. Hydrolysed prescription diets (Royal Canin HP, Hill's z/d) typically run £60–100 per month. Add veterinary consultations (typical UK first opinion £40–80 per visit), any additional diagnostics, and any prescribed medications during the trial. Most owners report a complete diagnostic trial-plus-reintroduction sequence costing £400–1,200 in food and vet fees, depending on protocol and trial length.

What Treats Can I Give During an Elimination Diet?

Vets typically restrict treats to either kibble pieces of the elimination diet itself, or single-ingredient freeze-dried treats made only from the same novel protein (for example, freeze-dried duck if the trial uses duck). Most commercial treats — even those marketed as natural or single-protein — fail an elimination diet because of cross-contamination, "natural flavours," or undisclosed ingredients. See elimination diet treats during the trial for the detail.

What If My Dog Refuses the Elimination Food?

Some dogs initially refuse hydrolysed diets (the texture and taste are different from typical kibble) or novel proteins they've never seen before. Vets describe several owner-tested approaches: a slow 7–14 day transition mixing increasing amounts of the new food into the old, warming the food slightly, adding a small amount of low-sodium bone broth made only from the approved protein, or switching to the wet variant of the same recipe. If your dog refuses all options, talk to your vet — there may be a different protocol that fits your dog better.

Disclaimer: This article is for educational purposes only and does not replace professional veterinary advice. Always consult your veterinarian before making dietary changes for your pet. Individual results may vary.