Duke is a GSD/Collie mix. He is a high level agility and obedience dog, and is working through trick titles as well. Duke is a very happy dog, and does well in busy situations and is good with most new people. He is high energy enough that he is my sport dog, but is calm enough to be the perfect family companion. Duke is inquisitive, gentle, and fun loving. He loves a busy day of activity and playing, and loves his training time. But he is also happy having a lazy day on the couch.