We have a little miniature longhair dachshund who was diagnosed just short of her first birthday with cushings. After extensive tests both at our general vet then at the University Specialist Clinic, since she was against all text books given her age and that she has never had cortisone.
Given her unusual age we decided to go for the Trilostane treatement which reduces the amount of cortisole produced, versus affecting the cells that make it.
We are now 14 months down the track of her treatment and have gone from 15mg a day to last week up to 60mg (progressively).
Her demodectic mange is now under control - after 9 months off daily ivermectin at 2.7ml per day (she weighed only 3kg then), and changed to dectomax injections weekly which had a better result.
Her skin is much better than it was (still a way to go to normal), her hair has grown back on her sides and feet, which just some hairloss under side.
She is currently on monthly ACTH tests to see if her medication is at a good level.
Personality wise - you couldn't ask for a better dog she takes it all in her stride.
When we initially started treatment the shampoos were all too harse on her skin, which was had an infection, so we used a lotion called Resichlor which contains chlorhexidine and it worked really well.
Hope this info is of some help.