Eczema Treatment Care

The skin biopsy results finally came in today and…
The balding donkey has dermatitis due to vasculitis causing atrophied hair follicles. Its caused from either auto-immune disease or strep and the donkey has never been sick.. so the first one is what we are treating for.
The vet is now calling CSU to see if we can treat him with steroids topically and not systemically due to the fat deposits that donks get and we don’t want to cause that on him..
I know there really aren’t alot of long ear owners on here, but if you guys know anyone that is reputable in treating mules/donks or have had this condition on your own equine, can you let me know. This is the first case my vet has had and being he is a donkey is adding added problems with treatment.
Feel free to email me with a contact person if you have one that I can pass onto my vet.
I and Ozzy really appreciate it!
*releived to finally have results*