It is best to feed cat grass after the cat reaches adulthood. Based on the cat's growth, gastrointestinal development, and oral tooth growth, choose a reasonable time to feed cat grass in an appropriate amount. Especially when the cat's gastrointestinal function is not good, you can give it some cat grass, which can help induce vomiting or help expel food in the gastrointestinal tract, so as to alleviate the cat's uncomfortable symptoms. Note that it is best not to feed cats grass when they are still kittens. Because the cat’s gastrointestinal tract is not fully developed at this time, eating cat grass at this time can easily irritate the gastrointestinal tract and cause vomiting or diarrhea.