We are guessing on the breed but Dart is 10 - 12 weeks old and weighs 14 pounds. He is a big boy and I believe full grown he will be LARGE - he almost seems like he has Saint Bernard in him. He is one happy guy, loves to play, play play. He is super sweet, gets along with dogs all sizes and ages. If you are interested in meeting or adopting him please email us at fochp@yahoo.com