German shepherds as adults are loyal, courageous, intelligent, and devoted. German shepherd puppies naturally grow into these characteristics, but they also naturally get into trouble. One thing that most German shepherd puppies do is bite and nip. It's how they learn about their environment. It's also how they create messes and, unfortunately, get injured. Before bringing your German shepherd puppy home, here are 5 ways to puppy-proof your house so your little pooch doesn't get injured.