My dog is a little over a year old. He is a white boxer/pit bull. He loves to play, however if I let him outside without a leash he runs away and thinks it's a game when I try to catch him. He's very quick so no matter how fast I go he is always faster! I cannot figure out how to keep him in the...

My dog Maggie (7 year old Lab)was trained very well by my Dad. Now she lives with my mom and she was listening to commands fine and I did some agility with her. It was all fine. Now all of a sudden she wont listen when we call her, she pulls even with her harness, she wont sit, stay or lie down...