I haven't either. These same friends had a different one when we first met them...he was a black/white named Goliath, beautiful dog! He was very friendly too and I thought he was big until I met Marker (this one). I think the sire/dam of Marker are show dogs, but Marker is just a pet, a very friendly pet. DH was saying that I could ride him, but to tell ya' the truth...I would have to climb UP to get on board! His back is way above my waist and he is also a wide guy. Great dog though.