UPDATE: Our little Rusty just had a seizure.

Sorry for the early update, Rusty just woke us up out of bed and was drooling again. He then had a seizure, convulsing and thrashing for 37 seconds. After about 10 minutes of laying still he returned to his normal behaviour.

We are terrified now and have left to see yet another emergency vet. A voicemail was left for our vet as well.