I have a senior cat, Spooky, who is experiencing arthritis and it hampers his mobility. My other senior, Mouse, is just beginning to get a little stiff. I have had difficulty finding very many glucosamine products for cats; chew treats seem to be the only thing. They have been on some, twice a day, for over a month. I feel like I am not seeing a great deal of difference. Has anyone had any experience with these, good or bad? I have a lot of animals and can't afford to be buying them if they aren't helping, as they are pretty expensive!