The Sammycat is one of those cats that has chronic hairballs, and even had to spend the night at the vet's office once for a blockage. I have been giving him a hairball remedy recommended by his vet, but lately that seems to not be working for him. Does anyone know a good quality hairball remedy I can get for him? Mom has suggested that I give him some vegatable oil, will that hurt him? I hate to see him trying so hard to get a hairball up and nothing happens