I have a 15 yr old alpine/Toggenberg cross wether who becomes a little stiff getting around as soon as the cold weather arrives. I'm wondering if there is any joint supplements that I could give him to help him stay a little more comfortable during the cold months? He is pretty active, you really wouldn't know he was 15yrs old. He eats really well, I try to make sure he doesn't get over weight. I don't feed him any goat chow, just hay and a goat mineral and he gets a deworming every spring and fall.