Also, we have his brother, Legos, who seems fine. He is healthy, active and playful, always has been. Even though they are brothers, they have very different personalities. Jimmerz is very low-key, Legos is more hyper, vocal and playful. Jim is overweight, Legos is very fit.
I have a 1 1/2 year old neutered male tabby, Jim. He is up to date on all vaccinations. He has always been a bit of a couch potato, and is overweight. He has always been on the jumpy side, but this is different.
We are extremely worried about him, and I'm taking him to the vet in the morning...