What should I do for my cat who has chronic hair?

The best thing I have found is Hartz Hairball remedy plus. It is a malt or salmon flavored paste. It has Omega 3-6-9 and Vitamin E. It is good for their coat and rids cats of hair. I groom my cats weekly, and you give them a 1 inch ribbon of paste a week. It prevents hair, as well as treats them. I have a long haired cat, and he had a real problem with hair, before I used this. Good luck.