Dear Jeff, I am so sorry to hear that you lost Pop. I know you tried very hard to keep him going and I'm sure he appreciated it. Thanks for the info on the Deslorelin implant. I am still in the process of trying to find a vet who will get the implant for me. I think I have found someone, but until he speaks to the company, I won't know for sure. The vet I was going to at first said she would get it for me, then said it was too much paperwork and would be very expensive and that I should use Lupron. I'm not seeing that vet anymore. She did tell me that the implant lasted 6 months, and I had heard of people on FML having theirs last longer than 18 months. But you're probably right that it should be replaced, as by the time you realize it's no longer working it could be too late. My thoughts are with you. It must be so hard for you, losing ferrets so often. With sympathy, Shron [Posted in FML 6912]