Smylees is a company that sells it - you can't get it direct from the manufacturer, I went down that route last year!! I have the one that is in like a toothpaste pump, and you smear it on their noses/ears - I remembered why pet is better, it absorbs into their fur/skin quicker than human ones do. I dont need it this year though, the current cats dont have any white on their face - but cats with thin fur also need it.