Our cat has always been rather inclined to pace around quite a bit, but recently he has started almost chasing his tail with the circles he's pacing round and round. His sight has been failing for a while, and we think he really can't see much any more (he often bumps into things). Dh thinks he's just moved to smaller circles so he doesn't bump into things, but I find it quite disturbing. He is about 17 (he came from a rescue centre about six years ago) and no longer in the prime of life (very scrawny, doesn't eat much etc) but I wondered if anyone else had any experience of a circling cat, and what it might mean. I'm a bit worried that if we take him to the vet we won't be bringing him back.