It may be that the owner overfeeds the cat's hair-reducing cream, which has caused the cat's loss of appetite and anorexia. Most of the cat's hair-reducing creams contain mineral oil, which can help the cat vomit hair balls, but excessive amounts will cause the cat to feel uncomfortable. . After this happens, the breeder can give the cat more water, eat some liquid food, or feed the cat with probiotics to regulate the intestinal tract, and then reduce the dosage and frequency of hair removal cream.