Nu-Stock. Google it; it can be ordered online. I doubted the claims, but it works amazingly well. Lola had some itchy spots where she'd basically eaten herself hairless (this was before I switched her to a better kibble and added supplements) and the hair wasn't growing in quickly until I applied this stuff. I was shocked, honestly. It's for livestock and dogs. Messy to apply - and has a funky yellow color - but once the ointment dries you can towel off the excess and it won't get onto your flooring/carpets. You might want to look into it.