I have used this product in both forms for several years with my now 12 year old Labrador retriever! He has arthritis in one of his elbows from an old injury. I often take him south for a couple of months in the winter and I think because of the humidity, he could hardly walk by the time we got back. After using Connectin, he can take several hour long hikes each week and never is sore or lame afterward! This product is amazing!! I did start him on the "initial dose" for the 1st 2 months then went to the maintenance dose. It took about 3 weeks before I started to see results.