Since starting this product 3 weeks ago, my extremely arthritic german shepherd/collie mutt has been able to resume her favorite pastimes of counter surfing and knocking the trashcan off the table so that she may snuffle around for snacks at her leisure. Also, the other day she jumped over a foot high fence around the garden - that has been able to keep her out because I've never seen her jump in 5 years. Both of these activities are a foot above her head and require the use of her "bad" back legs. It's been a year of trying to find a supplement her stomach can handle, with no incidences. Well, it's back to padlocks and impenetrable safe boxes. Thanks Halo for helping my pound dog be herself again.