Protein

• According to PetEducation.com, beef, lamb and chicken are the most common protein allergens for dogs.
  
  

Carbohydrates

• Carbohydrates in dog foods frequently come from cereals, corn, soybeans, wheat, rice and potato starch Wheat, corn and potato are the most likely to cause canine allergies.
  
  

Dairy

• Milk, cheese, yogurt and ice cream frequently cause canine allergies.
  
  

Additives

• Chemical additives in commercial dog foods may predispose some dogs to develop allergic food reactions. Antioxidants, histamine, and certain dyes are suspected by Wing-n-Wave Labradors.
  
  

Prevention of Food Allergies

• Diane Morgan, author of "The Basset Hound Owner's Survival Guide," recommends a varied diet from puppyhood. This will strengthen your dog's immune system and lessen the chance of food allergies.