biting puppy wild

Hi everyone! My parents adopted a 6-month old German Shepherd/Border Collie mix from our local Humane Society 2 weeks ago. He's an adorable, sweet, and very observant little guy named Brinkley. He loves getting belly rubs, being brushed, going for walks, and his kong. Although the shelter told...

When we brought home my puppy Mocha, he was very calm and quiet and didn't bite anyone. He played with his toys and didn't bite the furniture or bother the cat. He didn't just and waited patiently for us to pet him. As he got use to the house, he got more hyper and destructive. Now, when I get...

I'm confused about how to best control "wild" biting. Currently, my puppy, a Standard Schnauzer now about 14 weeks old, bites gently if I specifically play with him with my hands in his mouth, etc, but when he gets in his wild mode (when we come back from a walk, maybe when chewing a toy, if...