Well, I have Good News! Chewy lost about 2 lbs, but most importantly, she has been exercising ALOT and she is in good shape! She can walk a long way without huffing and puffing, and the best thing, her luxating patella doesn't luxate or whatever, anymore. She walks fine! Whoo hoo! I have put her on Natural Balance beef and turkey rolls, exclusively. For treats, I give her little tiny pieces of the same, and Pupcorn, which is low in fat and calories. All is well with her. But now, alas, her sister Sierra, has the same problems. She got overweight, has a luxating patella. can't walk well, and gets very out of breath when she does walk. It has been very hot here, so that makes it worse, because she hates the heat. But I have been taking her on our nitely walks, after it cools off. I carry her in a pack, for a while, and then I put her down and encourage her to walk a little and then carry her again for a while, then put her down, etc. We do that for about a half hour walk. So, I think it will eventually work for her as it did Chewy.