I already have a waterproof matress cover, but I did have to change the comforter to a washable type for now, until he gets older. They do make mistakes when they are young and they do get so sad when you say NO in a loud voice. But that is how they learn. Scolding works. Punishing does not. But I do agree if they make a habbit of peeing the bed they should sleep in their crate. I love my little furbutt baby soooo much.