The shaking could be a delayed reaction to the vaccination. I'm guessing that the lethargy and loss of appetite is due to the pain medication you gave Joey. You might try to take him off the pain medication to see if he gets his appetite back and to see if the shaking has gone away. If the shaking comes back, you should see the vet.
I haven't had any personal experience with shaking after Bella's vaccinations, but she did get very sleepy. She was better the next morning. She lost her appetite when treated with pain killers (Metacam) following her spay, so we had to decide whether to keep her pain-free but not eating, or in pain but with a healthy appetite. Since we were worried about her weight, hypoglycemia, etc., we stopped the Metacam and she got her hunger back and didn't seem to be in pain. It's kind of a trade-off or balancing act. |