How to prevent hairballs in cats:
1. To prevent cats from ingesting too much fur, you should brush them regularly to reduce loose fur on their bodies.
2. Feed your cat cat grass. Cat grass needs to be grown by yourself, but it grows relatively quickly. After eating cat grass, your cat will spit out the hairballs.
3. Do not use human shampoo to bathe your cat, as it will damage the cat's skin barrier and cause excessive shedding. Always use pet-specific shampoo.
4. You can feed your cat some hairball remedy. Hairball remedy acts like a lubricant for the intestines, helping cats expel hairballs. Most cats love hairball remedy, but it's high in oil and frequent use can hinder intestinal digestion, so be careful with the dosage. 
Symptoms of hairballs in cats:
1. The cat vomits frequently, and the vomit contains hair. When hairballs are severe, the cat will lose its appetite and become lethargic.
2. Because hairballs can clog a cat's gastrointestinal tract, affecting its digestive function, cats may also experience constipation, hard stools, and hair in their stools.
3. After hair accumulates in a cat's intestines for a period of time, its belly will become bloated.
