Re: My best friend
Hi and welcome to you and Ozzie,
First, I want to send you to our sister group, k9diabetes. They are the experts in this area and I know they will be able to help you tremendously with his diabetes. You can find them at -
diabetes info
http://k9diabetes.com/forum
Get registered with them asap. 
We have several members here who deal with both conditions and I am sure they will be along soon to share their experiences with you.
As for the vet who said to put him down, phooey on them! Both conditions can be and are coped with by many people and the dogs do just fine. It is not uncommon at all for both to show up in a pup so you just ignore that nonsense!
It would help us a great deal if you could get copies of the tests he has had done and post the actual results here, including the units of measurement and normal ranges for each value. Don't worry about those that are normal, just post the abnormal results. Post all the info you have on the tests for Cushing's, tho - LDDS, HDDS, ACTH and/or ultrasound.
Also, can you tell us how much Ozzie weighs? This will help us make sure the dose prescribed is correct. We are here to help you every way we can tho we are not vets. We have lived with Cushing's in our own lives, tho, and have learned a great deal which we are more than willing to share.
The most important thing for you to know right now is that you and Ozzie are not alone on this journey. We, and k9diabetes, will be with you all the way.
Hang in there!
Hugs,
Leslie and the gang
"May you know that absence is full of tender presence and that nothing is ever lost or forgotten." John O'Donahue, "Eternal Echoes"
Death is not a changing of worlds as most imagine, as much as the walls of this world infinitely expanding.