My adult cat has been on this for a few months now and I have noticed a huge improvement in his behavior. In short, he has anxiety. We’ve tried the pharmaceutical meds but he has had reactions. On top of this he has chronic constipation, but not megacolon, thankfully. He’s on medicine and supplements for constipation. He’s also had cystitis several times. He’s had acupuncture and chiropractic care. We have tried SO MUCH. And then I found this. He’s been so happy. He’s played with toys. He’s been less scared of everything. He hasn’t had a fecal or urine incident outside the litter box in a while. I’m so thankful!