The 4-month-old cat has been stealing beef, but she has been vomiting because she is too small. If beef is not digested, it will cause abdominal distension and vomiting in severe cases. You should give it some digestive medicine as soon as possible. Eating raw food and motilin will help gastrointestinal digestion, increase gastric motility, and it is not good to throw it away. Please go to the hospital for examination.