Cats will be fine if they eat one egg yolk at a time. It is not recommended for cats to eat egg yolks every day. It is generally recommended to feed one egg yolk every 2-3 days. Egg yolk is rich in lecithin, which has the function of nourishing the skin and hair. Feeding it for a period of time can help beautify the hair. Egg yolks need to be cooked and crushed before feeding them to kittens. They can also be mixed into cat food to make them easier to digest and absorb. Egg yolk is beneficial to the hair growth of kittens, but you should not eat too much to avoid irritating the gastrointestinal tract.