Dogs cannot eat egg whites because their digestive function is not as good as that of humans and it is difficult for them to digest protein. There is no problem if they eat a little, but eating too much can easily cause gastrointestinal discomfort, indigestion, diarrhea, etc. Moreover, protein also contains a substance called avidin, which can easily affect the absorption of vitamin H in dogs, so do not feed protein to dogs for a long time. If you want to supplement protein, it is best to choose to feed cooked egg yolks, but it is best to crush them and use them as complementary food. You can eat 2-3 times a week, which can make the dog's hair more shiny and reduce the tear stains of the dog.