My cat is about 15 years old, he's a little over weight but not enough so that the vet is worried about it. He's never been sick. He's normally very friendly and he had always been excited to eat. I feed him during the evenings and my parents feed him during the morning.
But I fed him this evening and he didn't eat, come to find out later that he hasn't eaten breakfast either. I gave him cooked beef and he tried eating a little of that. He's been drinking water too, but a half an hour later he vomited. I gave him a little tuna and he seemed a little excited about that but he didn't eat much of it. I offered him more, but he turned away and went off on his own to sleep. Hes being lethargic.