Allergies get worse with every exposure until you start seeing hives, facial swelling, breathing difficulty, and anaphylaxsis. A lot of vets will lump them all into the same category, but they are slightly different. They still need to be prevented the same, by figuring out what causes the issue and avoiding it. Chicken, beef, grain, potato, eggs are most common, but any ingredient that has protein in it can be the problem.
I figured out that my dog is intolerant to chicken and many grains pretty quickly, but just found out a couple weeks ago that he also can’t handle tomato.
