When a dog is allergic to chicken, it's typically allergic to the specific proteins found in the chicken muscle meat. Allergies in dogs, as in humans, are caused by an immune system reaction to certain proteins that it mistakenly identifies as harmful.
Proteins are complex molecules that play critical roles in the body. They are made up of smaller units called amino acids. Amino Acids are the building blocks of proteins. There are 20 different amino acids that can be combined in various sequences to form a protein. Different amino acids are present in muscle meat, organ meat, fat and eggs
Here's a breakdown of why a dog allergic to chicken might not be allergic to chicken fat, chicken organ meat, or eggs:
Chicken Fat: Chicken fat is quite different from chicken muscle in terms of its protein content. Fat, by its very nature, contains significantly less protein than muscle meat. Since the allergic reaction is triggered by proteins, the low protein content in chicken fat often means it doesn't provoke the same allergic response.
Chicken Organ Meat: While organ meats (like liver, heart, etc.) are technically muscle, they have a different composition and structure than the typical chicken muscle meat (like breast or thigh). The specific proteins in organ meats can be different enough that they don't trigger the same allergic response. However, this is less predictable than with chicken fat, as organ meats do contain proteins that might still cause allergies in some dogs.
Eggs: Chicken eggs are a completely different biological material. The proteins found in eggs are distinct from those in chicken meat. An allergy to chicken meat doesn't automatically mean an allergy to chicken eggs, as the immune system may not react to egg proteins in the same way it does to chicken meat proteins.
It's important to note, though, that individual reactions can vary widely among dogs with food allergies. Some may react to all parts of the chicken, including fat and organ meats, while others may only react to the muscle meat. It's always best to consult with a certified dog nutritionist or a veterinarian that is well versed in nutrition and allergies for advice tailored to the specific needs and health issues of a particular dog.