We tried the Wiz dog...Max, the 7-month old refuses to use it. He still will only go on the paper. Milo, the 4-month old used it twice. I put "used" paper under the tray and that doesn't seem to work....Milo will go outside before he uses the wiz dog. Milo also eats the paper, pee pad etc. He enjoys dragging it around the house
