My cat is my cat is almost 9 months old. He is a very good cat is in good health and uses the litter box with no trouble. The only problem is that he some times takes care of business to close to the side and on a few occassions has missed and gets urine on the mat on the outside of the box.The box has one of the tops that snap on making it a few inches higher but he has still managed to miss one or two times.Keep in mind this has only happened a couple times since I have had him but I would like to know if anyone can recomend a higher or larger box and where I can get one other than the local pet store, is there some place on line? Thanks!