After cats suffer from acute gastroenteritis, they should take probiotics to regulate their gastrointestinal conditions. In terms of diet, they need to be fed some liquid food that is easier to digest and absorb, such as cat food soaked in warm water, and some glucose can be fed to maintain physical strength. When a cat has severe vomiting, it needs to be fasted and water-free for 1 to 2 days to avoid food irritating the gastrointestinal tract, increasing gastrointestinal burden, and making the condition more serious. If the condition does not improve, it needs to be treated in a pet hospital to avoid delaying the best time for treatment.