Awesome for dogs!
I give this to my large dog who has luxating patella, among other joint issues.  He's 9 years old and has been taking it since he was a year old.  It is truly amazing how he went from being almost immobile to running around the yard, up and down stairs, and jumping on the bed. GCL1000 is marketed for dogs, however, the 2000 is the same exact product and is more economical.
Rating: 5 stars