Our cat for the past several days has not been himself. I have already made an appointment for the vet tomorrow morning but am wondering if anyone has been through this. He has been vomiting periodically, some diarrhea, and is staying in one room of the house. The only time he comes out is to use the litter box and eat the wet food we put down, then he goes back into that room. He has also eaten his cat litter a few times. Has anyone been through this with their cat?