Cats can eat overnight omelette, because overnight omelette is not poisonous and can be eaten. However, cats can only eat a small amount. Overnight fried eggs are heavy in oil and contain seasonings. Excessive feeding may put a burden on the cat's body and easily cause symptoms such as diarrhea and indigestion. You can usually feed your cat some boiled eggs. The egg yolk contains lecithin, which is better for the cat’s skin.

Precautions for cats eating eggs:

1. Do not eat protein. Cats should not eat egg whites. The avidin contained in the egg whites will destroy the vitamin H in the cat’s body and easily cause the cat to suffer from vitamin H deficiency. Moreover, the protein content of egg whites is relatively high, and cats are prone to indigestion after eating them.

2. Do not eat raw eggs. Raw eggs may contain bacteria or parasites. If they are eaten by cats without heating, they may be susceptible to parasites or cause gastrointestinal discomfort, vomiting, diarrhea and other adverse reactions.

3. Do not overdose. Even if it is egg yolk, the owner does not have to give it to the cat every day. Cats' intestines and stomach are not as good as those of humans. They need to pay attention to the right amount of food. The owner should feed it egg yolks two to three times a week, one at a time.