The reasons why cats vomit are as follows:

1. It may be that they have eaten undigested food. Cats’ digestive function is weak. If they eat indigestible food, such as hair, bones and other food, it will easily cause the cat to vomit.

2. It may be that you have eaten spoiled food. Microorganisms in spoiled food can irritate the cat's intestines and cause the cat to vomit. It is recommended that cat owners feed their cats fresh and healthy food.

3. It may be due to eating cold food. If you feed your cat food that is too cold, it will cause vomiting and diarrhea. It is recommended not to feed your cat food such as ice cream and popsicles.

4. It may be that the cat has eaten food that is toxic to the cat. Cats must not eat chocolate, grapes and other foods. These foods are poisonous to cats. The first reaction of a poisoned cat is to vomit.

5. It may be that you have eaten food with strong taste. Cats should not eat foods with strong flavors. Human diets that are heavy in oil, salt, and seasonings are very detrimental to cats and can easily cause cats to vomit.