Food allergy and food intolerance have often been used interchangeably but these two are actually distinct from each other. When a food allergy occurs, the immune system is involved. It goes into overdrive in response to an ingredient (allergen) in pet food. Hypersensitive dogs suffer from skin problems like rashes or itching, as well as digestive issues such as vomiting and diarrhea. On the other hand, the immune system is not involved when it comes to food intolerance. In this case, the animal’s digestive system is reacting adversely to something that they have eaten such as a new type of pet food. Food intolerance is a localized reaction but the symptoms are similar to food allergies, which is one possible reason why each can be mistaken for the other.
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