Maybe, see if your vet will give you a referral to the Critical Care Office in Ballard (there isn't one in Bellevue) or to an internist. Both places won't take patients without a referral. We went to Tacoma for an internist.. But you do cut out the middle guy, your vet, and get right to the specialist. If you end up at a specialist anyway, they will repeat all the test your vet did . so pay twice. This is the route I'd take if your vets can't tell you whats going on.
Katz