Gizmo is doing much better today. He is still not his normal self, but I think he's going to be okay. I gave him some Karo syrop. He's not eating as much as normal, but he's not constantly shivering anymore. I couldn't get ahold of the vet yesterday and it's Saturday now. (My husband's in the navy, and we're stationed in Japan so I only have one option, unless it's an absolute emergency; then I would take him to a Japanese vet.) Well, thank you all for your help. Sorry about the delay in an update, but I sleep while you are awake and vice versa.
Valerie