Give him a pill of probiotic, make sure he drinks water, be very gentle and loving with him especially now as believe it or not that helps them recover, I am not a vet but it seems that he might have a stomach virus , just like we do sometimes, but keep asking and googling if you can't take him to the vet, also a warm infusion of mint or fennel seeds help, you have to use a dropper and force him t to drink that way..GENTLY
If your cat is old, signs of body having problems. If your cat is old, it means your cat is in the beginning stages of starting to die. If your cat is young, your cat is sick and needs to see a vet. Either way, time for a vet.
Well, I had a cat a few years ago that had a problem with his heart. Before he died, he started puking and pooping every day in the house. We had no idea what was wrong with him so we took him to the vet, they said that he had a heart problem ever since he was born, caused by late birth...