What to do if a cat vomits white foam and is not energetic and refuses to eat:

1. It may be indigestion. If a cat eats too much or spoiled food, it will cause indigestion. It is recommended to feed probiotics to regulate the intestinal tract.

2. It may be gastroenteritis. When cats suffer from gastroenteritis, they may experience symptoms such as vomiting and foaming, loss of appetite, and depression. It is recommended to use drugs to protect the gastrointestinal mucosa and to control symptoms with anti-inflammatory drugs.

3. It may be hair ball disease. Hairballs in cats cause foaming at the mouth. It is recommended to feed hair remover cream and cat grass frequently to promote the discharge of hairballs.

4. Poisoning may cause the cat to vomit. In this case, the cat needs to be taken to the pet hospital for treatment as soon as possible.

5. Caused by renal failure. Cats suffering from renal failure will have problems in all aspects of their bodies. Typical symptoms are dehydration, vomiting, fever, etc.