I want to let you know how well your product has worked for our senior cat, Diefenbaker. Dief is 15 years old and very stiff in his hindquarters, partly due to surgery on a broken hip 13 years ago. I saw your product and thought I would give it a try. Within a few days, we thought he seemed more comfortable & less stiff. My vet says that there’s no way this product will work unless the animal takes it for 2-3 months but he’s wrong! We noticed a difference within a week! Thanks so much!