Pet Food Allergen
Lamb Allergy in Dogs
Lamb was historically marketed as a hypoallergenic "novel protein" — but its widespread use in sensitive-stomach formulas for the past 20+ years has eroded that status. Sensitised dogs are now common. For elimination diets, vets more often prescribe genuinely novel proteins like kangaroo, venison, rabbit, or duck.
Prevalence
~5% of food-allergic dogs react to lamb (Mueller 2016) — higher than a true novel protein would produce.
Label names that contain lamb
Any of these on an ingredient list means lamb is present.
Ingredient pages
Cross-reactivity
A pet allergic to lamb may also react to: beef (via serum albumin). Cross-reactivity is not guaranteed, but it is common enough that it should inform an elimination diet.
Symptoms that point to lamb
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Factual reference based on AAFCO ingredient definitions, FDA guidance, and peer-reviewed veterinary literature cited above. Not medical or veterinary advice. Consult a veterinarian for decisions about your pet's diet.