Cosequin, I used it for several months for Skinny and mixed it with yogart.
It sure made his poops smell awful. I only used it when he had his flare up.
I have 3 unopened boxes (it was cheap to buy in bulk) that I should send back for refund. Do I think it worked for keeping UTI's away? No to be honest. We got an extra watering fountain and added wet food to everyones diet, that has kept Skinny healthy.