Our Sneaker was very ill last night. He's about 4 y.o. We let him out to play. He was extremely lethargic, glassy-eyed, would take a couple steps and then sit down. Ate a Bandit very reluctantly and then immediately vomited it back up. Sat in Mama's lap without moving (very unusual).
We took him to the emergency vet (who admitted she wasn't very experienced with ferrets). He perked up a bit once we got to the vet but was still sedate. X-rays showed no masses or tumors. We have noticed a weight loss in the last several months but thought that was from the stress of a new baby in the house. No hair loss.
The vet gave a rule-out diagnosis of insulinoma. We're seeing our regular vet today. Any other ideas?

