Brutus would pee on ANY bed he could right from the first day we brought him home. It didn't not matter if it is his, my other two dogs, if it was in his crate, out of it, it didn't not matter. You may very well have a bully that likes to pee on his bedding. Maybe marking his territory? Regrettfully for my other dogs it means no beds because if Brutus wasn't peeing on them he is now eating them like it is his worst enemy in the world. I might add that Brutus has been completely house broken since he was 11wks old. No inside accidents. It was just a bed thing.