Jul 05, · Old Cat Not Eating You may have noticed that as your cat grows older, he TENDS to lose his appetite quickly. Either you see him in pain as he eats, or walks away from his bowl come . Oct 21, · It's common for kitties in new environments to not eat or potty for day or so. They are scared and everything is new new people, new routine, new smells, and new sounds. If you're not .