Dogs can develop food allergies to foods they eat all the time. Some proteins are more common in commercial dog food, like chicken and beef. Because of this, dogs can develop allergies to these and other common proteins in food blends or single protein food they’ve eaten for years.
Low allergy could simply mean that a food contains a more novel protein, like goat or rabbit, that your dog hasn’t had the opportunity to become exposed to. Wheat, dairy, soy and other common allergens may be missing from the food.
Alternatively, there are hypoallergenic dog foods on the market made up of hydrolyzed proteins. Hydrolyzed proteins are designed to prevent immune system response.
“These diets are manufactured under the strictest quality control measures, which ensures that they aren’t contaminated by ingredients that are not included in the label,” according to PetMD.
If your dog has allergies, always read ingredient labels to determine how the food has been adjusted to be considered low allergy. Vets can also provide guidance on low allergy food.