So far, so good! We have been using this for about a week now. In the last couple of days, she has seemed to have more energy. We have an 11 year old husky/lab mix, and she's been on different glucosamine supplements for a few years. I had to change up more recently, and I noticed a month ago that she was really struggling as the weather warmed up. She was not getting up as well by the evening. Like I said, we decided to try this before the next step at the vet, and it has been good so far. I can't speak to long term yet, but I am hopeful.