I almost don't believe it myself, but they are having so much fun with each other! Makes me so happy to see them playing. There was a minor mishap last night. We aren't really sure what happened exactly, but they were playing in the living room upstairs, there was a big thud, and then Tonka came running down the stairs whimpering so I think that means Marley won. Ha ha, not that it was ever a competition though, he's got more than 60lbs on Tonka.