I love this cat liter hide-away!  The only thing I'd chage is to make the dvider have a cat "door" in it so that the cats walk through a "hallway" befire and after going to the litter box.  This would kep the dog away frm the litter and be one more barrier for the smell to escape.  My husband is going to cut the divider and mke it happen, but that would be a nie design change!