Hi, my friend has a two year old female tree squirrel from the Sacramento region of California she rescued as a baby they recently moved to Nevada and after a couple months the squirrels cheek started to swell. She found a vet they inspected her teeth, she has a little gingivitis but they're fine, they said it's not an abscess. Tthe vet gave her Enrofloxacin and an anti-inflammatory called metacam. She had x-rays done, blood work that even got sent to a specialist and even the specialist couldn't tell her what's wrong. They checked for MBD and it's not that. She even changed her diet and ordered the Henry's squirrel blocks we found off another post on this site she's been on for about a week now and haven't seen any improvement. We're not sure if this is fatal hopefully someone can tell us how to help my fiends baby.