The county has a few small tertiary hospitals and one “major” hospital at AR Gould. They can cover the basics of normal care, lab work, radiology and most emergencies. For any specialty care you’re going to be driving to Bangor. The county has few specialists due to the low population and pay for providers so most people refer to specialists down in Bangor for anything outside of general care. I would recommend your cousin contact the hospital closest to her and ensure she can establish a relationship with any needed providers prior to moving up there so she isn’t caught in a bind at the last minute.

Just to add as well, I’d they have pets you’re screwed on fixing decent vet care. Almost none of the very few clinics are taking new patients right now.