I have three, two are guardians for stock, one of which I retired, he is a massive indoor room blocking older shepherd, he did his job and will live inside now. The other guardian will take on anything that enters the yard, he protects the poultry and is serious about that. A few months back I looked outside and found him surrounded by wild turkeys and was watching over them too. My wife has a Yorkie, we still cannot agree if that thing is really a dog or just a hairy, loud, squirrel.