your cats get hair balls ? have you tried use petroleum jelly, just put a little on their noses ,planting some oats is also good they will just eat it up, plant it in a small pot and when it gets to be about 3 or 4 inchs let them eat it , you can get oats from a farmer who as horses . your cats will love you for it .
OMG! do not use that!! you can buy hair ball treat which i feed my kitties everyday and they rarely get hairballs. when they do i use a thing i get at petsmart called lacetone. it comes in shrimp flavor which you put on their nose and the top of their paws. their vet recommended it. try those and stay away from the jelly.
no money for the vet and drug companys, if you use vaseline "I hate use brand names " you don't work for a drug company, do you?
my cats love it they eat it right out of the jar, it's like they know their getting hair balls and need some help passing them, yes I find the hair in their stool, you should plant some oats their will eat it up. OH their all long hairs