I've tried my dog on the GreenGold sticks after meeting the owner of tonictreat at the pet expo.  My dog looks for her GreenGold stick every morning straighten after her breakfast. 
I think the natural ingredients are helping her with anxiety after moving country.  Combined with the JointAid stick,  I also think it is helping with her arthritic pain,  I have been able to keep her on the lowest level of pain medication. She loves it as a treat if nothing else.