This is a follow up post about a 7 year old ferret who has both Insulinoma and Adreanal disease. I took him to the vet today and had his glucose checked (two hours after he got his normal pred dosage). Is glucose level was 58. We are adding diasoxide to his pred. I knew or at least thought that hind end weakness can be caused by Adreanal disease and he is an older ferret and usually rested more than he moved around. It just bothered me that his hind legs were so weak. Now we know it was due to his insulinoma. We will have him on the diasoxide for a couple weeks and recheck his glucose and go from there. Thank you to everyone who replied and offered information Mike [Posted in FML 6554]