Butt had a limp forever and we could never find a reason for it.He had been a Glucosmaine and Chondroiton since I brought him home.After reading some old posts here and some other articles on the net about Vit C,I swicthed the pills they were getting.Now we use Osteo Bi-Flex or the store genereic equivilent.It has Glucosmaine,Chondroiton,MSM,Vit C plus some other stuff.Within a week his limp was gone and has not been back at all!!!!! I don't know it was 100% the pills or not.I also had 2 distance Reiki healing sessions on him in that week too. Both him(157 lbs) and Tub(126 lbs) get 2 pills a day.