Hi All - A few months ago I came across an article from the British Small Animal Veterinary Association's Manual of Exotic Pets about a research project using Delvosteron made by Intervet (Proligestone 100mg/ml). The article stated that there were no observable side effects and the product did not affect the heat cycle the following year, even if used for a second time. So, I used it on my jill, as I did not want to breed her this year - she had a late season pregnancy last year and came into heat early in February this year. In less than a week all signs of vuvular swelling were gone, and she has shown no signs since. A number of ferret owners here in Israel have also used it with no problems. I decided to start giving my kidds frozen and thawed mice again, and so thawed them out, dressed them in a little ferretone, as 1 out of the 3 had never had the joy of a mouse meal, and all went well, except the next day, it became very, very clear that someone had hidden his mouse instead of eating it. Understand, Israel is in the middle of a rather severe heat wave.... I keep my kidds in a large ferret room with lots of boxes, blankets, tubes etc... And I cant find the darn 3rd mouse!!!!! <sigh> Take care, Beverly Burge Zoological Assistant - Jerusalem Zoo http://www.itmi.com/jeruzoo/ [Posted in FML issue 2341]