Thanks YLL. I am in tears right now as just about two hours ago Meeko had a seizure. It was the first rat seizure I have had. He is old, but not that old. His little front arms were flailing around and his mouth was all open and stuff. Even after picking him up (I noticed a weird noise so I looked into the cage and saw him seizing) he seized for another 12 seconds or so. I don't know what I am going to do if he dies or keeps having seizures. Looks like I will be making another trip to the vet, possibly for euthanasia.