I have same problem with Obi , same symptoms and diagnosed as vasculitis . He is on meds x 3 weeks now and will take him to the vet for follow up next week . I tried to get ear muffs for him to somehow protect his ears from the cold but Obi just find ways to take it off . Medication is a pill called PENTOXIFYLIN ER 400 mgs .I give 1/2 tab 2x a day . I r said doesn’t work right away , take 1- 3 months . I wish I can do more for him . Do you know of better ear muffs? We r getting lots of snow here in Maryland and he just loves to be outdoors. Help!!!!