He is an older boy, about 13 we think. All in all very healthy and still prone to chasing after something and nothing in the garden like a wee kitten. But in the last couple of weeks his behaviour has become a little odd. When we are around he would have never ever got onto a table or kitchen work surface (don't know about night time) but suddenly now he's jumping up there bold as brass and strutting about! Yesterday he sat next to me whilst I had a sandwich at lunch time and right in front of me tried to paw my sandwich off the plate!!!! I do think on the whole he drinks a lot more water and eats more food, which I know can be a sign of kidney failure, which is common in older cats, but what's with the sudden lack of discipline?? Is he going bonkers?