Generally common allergens include beef, mutton, wheat, chicken, mutton, soybeans, pork, dairy products, etc. Each dog may be allergic to different foods, so if your dog has an allergic reaction, it is best to find the allergen first, then take orally or inject anti-allergy medication, and then do not feed the dog food containing the allergen.

How to deal with dog allergies:

1. First, immediately stop feeding the dog or letting the dog touch the food or items that cause it to be allergic.

2. Secondly, bring the thing that causes the dog's allergy to the animal hospital, and let the doctor give the dog a specific treatment plan based on the specific situation.

3. If conditions permit, owners can conduct allergen tests on dogs to prevent dogs from developing allergies in the future.