What part of Portland do you live in? I went to VCA on SE 138th and Stark. Dr Jennifer Holmes. It's a 24 hr facility but their after hours visits aren't much more than a regular appt. For emergency I definately recommend over Dove Lewis. I had an emergency and went to VCA. Wanted to change vets anyway so stayed with VCA because in case of emergency they had his records. She was supportive of me testing. I never had to dose Billy though so not sure about treatment, but she was willing to listen, learn and work with me. Heartfelt on NE Broadway has good reviews on Nextdoor as does Irvington Vet clinic. Don't use Broadway Vet. The Portland Nextdoor sites are pretty active. It would be worth posting an inquiry on there.
ETA: Sorry wrong doctor. I was with Dr Holmes. Fixed in message.