Kittens should eat half or one egg yolk at a time, and no more than one yolk a day. Just feed 2 to 3 eggs a week to avoid indigestion. It is also best to boil the egg yolks and then chop them up and feed them to kittens. The cat choked. Egg yolk contains protein, vitamins, trace elements, etc., which can help cats supplement nutrition, promote growth, and make their hair more shiny.