I'm a Veterinary Technician. My beautiful best friend, my almost 14 year old female APBT, has been having a tough year, limping terribly from a decade old "healed" ACL injury. She has been losing a lot of muscle mass, making her also very weak and having difficulty getting up, staying up, and moving around in general. She was losing interest in eating. Her urinary incontinence that she's always had was getting worse than it had ever been. I really thought that was it for her. If I could not get her to eat, I couldn't let her take pain meds, but without pain meds, she had zero appetite and it was a vicious cycle.6 months ago, I decided to give this a shot. If this didn't help her, then I would make the awful decision to end her suffering. Even though I'm usually more careful about higher protein content with elderly pets, I figured we had nothing to lose by trying it. I'm so glad I did!!Within a day of twice daily dosing, she wanted to eat. Within a week, she was playing more than she'd played in weeks. I was able to take her for little walks again and she even gained some muscle back. I was able to resume giving her meds to help with pain and inflammation. An odd side effect has been that her life ling urinary incontinence has completely stopped on this. I do not understand! She has been on every med on the market and every homeopathic remedy available since she was 2 years old and while they would all initially work, they would stop working rather quickly. This may be similar and maybe it will stop working also but to be honest, I don't know that she'll live long enough for that to happen. It's been amazing not having to change her dog bedding several times a day and not constantly smelling dog urine.She took 2-3 months of this and then I stopped to see if she could go without it. She did really well and kept her appetite, so I could keep giving her pain meds, and she was acting fine, but she has been losing muscle mass again, struggling to keep her back feet under her, and she needs that muscle to do that. So I bought this again and after just 1-2wks, it's already bringing a little bit of muscle back.I'm going to keep her on this until her last day with me!I highly recommend this, especially after illness or injury. It does work! If it works for my old lady, I can only imagine what it would do for a healthy, young dog. I wish I had given this to her when she was younger after her injury. If she'd had more muscle back then, it would have meant less pressure on her joints/etc and it could have meant more quality elderly years now.