Can cats eat egg whites?
Cats can eat eggs. 
However, it is only recommended to boil the eggs in plain water; eggs processed in ways suitable for human consumption are not recommended. It is suggested to feed only the egg yolk, as it contains many nutrients, including protein, trace elements, and lecithin. High-quality protein can provide excellent nutritional supplementation and greatly help with the healthy development and immune system of cats.
There are many breeds of cats, and eggs require a certain level of digestive ability. If your digestive ability is weak, it's best not to feed them, especially young kittens.
Adult cats can eat a little bit of eggs. However, when feeding cats eggs, feed them a small amount first and observe whether the cat experiences any discomfort after eating the eggs, especially allergies. If not, then it's not too late to start feeding the cat eggs.
