Jenna was diagnosed with canine vasculitis in March. She mostly had an inflamed rash that seemed at first to be an allergic food reaction. She got to the point where she was having trouble breathing and her heart was beating at a very high rate. She never really developed any lesions, some mild pocking on her ears, but the vet had recognized it within a week of her taking ill, so my guess is we hit it with the meds quickly and prevented the lesions.
She had to be on the pentoxifylline for a whole month to assure complete healing. She could not take steroids (Medrol, if I remember correctly) as they had already used them and these caused her to have some very bad vomiting episodes, that left her dangerously dehydrated. She wound up staying in hospital for 4 days after that. However I find lots of dogs use them with no problem. Jenna just seems to be especially sensitive to many medications.
I hope Ollie will be feeling much better soon.