hello,
I would say that my advise would be to keep a close eye on him, ie eating, drinking, peeing, pooping and behavior.. Call your vet, register the concern, and see how things go. Ask to be scheduled for the next available appointment. If he hasnt had his annual exam, or blood work/diagnostics in the last 3-6 months it is probably a prudent thing to do,
good luck
krista
Hello.
Please see a vet. They can help. There are so many things it can be and a vet visit is the best place to start.