Hi Tracy When my baby had his implant it never did much I waited 6 wks. and no hair no change. So th vet tried the new one that is on trials right now, desrelyn and wala he started getting his hair back and he looks so beautiful. My vet teaches at a University and he has tried both and seems to feel this new one works so much better. Only trouble some of these babies leave because of some other problem. Hope yhis is an answer to your ques., although could be my ferret is an oddie like his mom. LOL and Dooks Beck and Pooh [Posted in FML issue 5258]