It hadn't even been a full week but my 10 year old Husky/bully is doing so much better than I expected! He’s up and playing which he hadn’t done in months!! No changes in his stool so far, just a happy happy boy. Its been almost a month and he's so much more active, will definatley buy again. UPDATE: i switched to a different brand when these were out of stock, i had to give him 4-6 to get the same dosage! needless to say ill only be buying this bottle from now on! works so great, my baby is able to go out and have fun! UPDATE #3: ive officially been using this long term and my boy is so happy and he can move so well ill never use another brand!