Hi, I have a sheltie/collie mix. she is 10 1/2 yrs. old. She is overweight. We seem to go in circles with the vet. She is overweight so she is fed diet food etc. I say she can't loose weight because she seems to have a hard time with joint problems so exercising is hard. He says she has a weight problem because we don't exercise her. It seems if she felt better in her joints, etc. the exercise would go better. I have looked on pet meds. Does anyone use these med.'s with good results. Its not too bad now but she is getting older and I want her to have a good quality of life. thanks.