Hairballs

Every morning we wake up to hairballs. They are on the couch, floor, and even our beds. We have tried given them specifically for hairballs as well as treats and a hairball lick stick. Which they love. However we do not know which cat is having the hairballs. So we give treatments to all 3 of them. None of the treatments seem to be working though. Is there anything else we can do to treat the hairballs? Also tonight we are putting every cat in a separate bedroom with one of us and hoping to find out which one is having them.

Once you find out who the culprit(s) is, take that cat to the vet. The frequency of hairballs you're describing can be deadly. The vet will help you set up a proper treatment for them and discuss diet changes to a higher fiber food. For cats with serious hairball issues, it may be necessary to use a prescription hairball formula food.

The vet will also help determine if this is just shedding based or if there's an over grooming problem, too.

Things you can do for all the cats. Get a deshedding tool such as the Furminator or Zoom Groom. The latter works well for cats that are more fussy about being brushed. These are not normal combs or brushes, so even if you already brush your cat these will be much more effective at removing loose fur.
Talk to the vet about a fish oil supplement that you can purchase in your area or from the vet. Fish oil helps keep the skin and coat in better condition and can decrease shedding.