My sons first word wasn't mom or dad it was kanga, our staffordshire terrier. He learned to get over baby gates by using hand signals to tell her to si & stand as he stood on her. She knocked him down once by jumping over the baby gate (at his beckoning) and I swear she felt horrible because she wouldn't leave his side even went & slept on his floor while he took a nap that day. She was a very passive dog, got beat up by ferrets even. I personally never saw her so much as growl. My sister was watching her while I was on vacation and kanga went ballistic on her broth-in-law growling, showing her teeth etc. & backed him into the corner where he literately pissed himself in fear (sister called her & she came running tail wagging and all) about a month later my sister found out he was a pervert who had abused his own children & had embezzled alot of money from her husbands company as well. I love apt & amstaffs (most don't know the difference) & it's a shame people are so ignorant about them.