Dogs aren't born aggressive, they're taught aggression. There are no bad dogs, only bad owners. Simple but true.
+1 just a thought when reading the posts, I read the dogs had a toy bear they ripped apart. Bears/kids look pretty much the same to dogs, so keep the toys simple like balls. They might not eat your kids as they may become part of the pack but others could be in trouble if they get that prey drive going with animal looking toys especially if you play fight with the toys and dogs. Even aggressive play is how a dog learns how to attack etc. I've had only German shepherds and know how to make pussy cats or killers out of them.
