Thanks all. These are great suggestions. He's slowly but surely started eating like his old self again, no explanation for it, so maybe he is getting a little "senile" in his old age..In response:
His food and water bowls are both raised so he really doesn't have to lean over much.
He does have tags on his collar, but he has had them forever, and they never seemed to bother him before. Although I hear them clink every now and then when he goes to eat.
I thought about him possibly having slipped on the tile, and I think that is probably the most likely scenario, he got spooked and was afraid to go near the dish since that's where it happened.
The suggestion that maybe he is seeing things is entirely probable too, hadn't thought about his eyesight since he can see squirrels through the back window of our house clear across the yard.
He was just to the vet a month ago and everything checked out good. Doesn't seem to have any pain that I can tell, just the usual old bones things when he goes to get up, he's not as quick as he used to be.
Whatever the case he seems to have cured himself, although I can still see he's kind of tentative when going up to the bowls. Guess I'll just keep an eye on him, and the suggestion about a bigger rug under the dish is a good one too. Thanks everyone.
