Walter is a playful and happy 15-month-old puppy and is great with kids! We did a DNA test and he is 3/4 German Shepherd and about 1/4 Pitbull. He loves to play ball, run at the dog park, and be close to his humans. He typically plays well with other dogs, but prefers female or submissive dogs. He is generally good with our cat, but does get on her nerves. He just wants to play! He loves bully sticks and playing tug of war. He requires about an hour of exercise/playing per day, or he starts to get restless. He is house-trained and kennel-trained and knows "sit," "come" and "stay." He needs more training with good leash behavior. He tends to pull. Recently we bought a collar with prongs on it, and that seems to help.