My cat is very hyperactive and extremely obsessive, I gave him recommended amount of doses and, I can already see an affect in his behavior. He is active, playful, but not obsessive in wanting to smell the floor for food or lick whatever is on the floor. I would clean the floor but his little nose can pick of residue smell of where food was once left, going for a hunt for whatever he can lick. Very obsessive cat. I would play with him, keep him active, and take him for walks, give him the right portion of food but he would be extremely obsessively looking for something on the floor no matter what. It got to a point where he would lick the bathtub. However with this product, I saw him as normal as he can be, like a normal, active, and healthy cat. I figured to get him this because his personality has been the same ever since as a kitten, he would spot out little marking and obsessively tackle it (which was so fun and cute to watch), but as time progressed he started to lick residues of food, to even soap that would accidentally fall to the floor, anything really, as if he has an obsessive compulsive disorder. So thank you Pure Spectrum for this product and for those who come across this review I highly recommend it!