We have a chichuahua mix t hat learned to do his buisness on people bed pads placed where he can find them. Easy to keep picked up and disposed of. He had some problems when we first got him 3 mos. ago. At first we took him out even at 3 in the morning, but he knows to "go potty" He sleeps on the big be with me and even gets up in the night and hurries back to bed. Of course he had a few accidents.