My two boys have a two level hutch and they always do their business on the bottom level so I popped a litter tray in the corner they use the most. They do use the tray but also still go everywhere else on that level. Ive tried putting the poo's into the tray that I find out of it, but they seem to poo alot and I can never keep up! How else can I encourage them to just use the tray?