I just got a kitten (about 6 months old now), and I've had another cat, about 5 years old. The older one eats wet food, since most of his teeth were pulled. The kitten eats kibble. I notice that the kitten likes the other's food, and constantly tries to steal it, even after scolding and squirting water at him, but he continues and is very persistent. I kept the older's wet food on top of the washer since the kitten couldn't jump up there, but I wasn't sure if, in the long run, it would not be healthy (causing arthritis/issues with the hips, etc.), so I moved it on to the ground. Please advise on how best to keep the kitten from eating the other's food.