Be Careful When You Let Your Dog Eat Egg Whites
Eggs, as a whole, are considered safe for dogs to eat in moderation as long as they are cooked. It’s important to not let your dog eat raw egg whites. This is due to the presence of avidin, an enzyme that could prevent the dog’s body from absorbing an important vitamin called biotin.
Dogs that suffer from biotin deficiency may gradually suffer from a number of conditions and symptoms such as crusty skin or chronic fatigue. Biotin deficiency, however, is considered relatively rare among dogs so it’s unlikely that your dog will get it from just eating a single raw egg white.
Keep in mind, however, that there are other health risks involved with eating raw egg whites. Dogs, for example, may end up suffering from food poisoning due to bacteria like salmonella.
To summarize, dogs can eat egg whites in moderation as long as they are cooked. There’s nothing wrong with feeding dogs a bit of cooked egg yolk so it might save you some trouble if you just let your dog eat the whole egg as an occasional treat.
One last thing to keep in mind is allergies. Some dogs may unfortunately be allergic to eggs so make sure you test for that first by only letting your dog eat a tiny amount the first time.