It is normal for cats to vomit after eating grass. Owners do not need to worry because cats often lick their fur. When a certain amount of hair accumulates in the body, the cat will find grass and cat grass to eat. The purpose is to promote gastrointestinal motility and help remove hair from the body. . It is recommended that owners plant some cat grass at home and give cats some hair removal cream to help cats remove hair from their bodies.