[Ashley V]

I agree with the others, he's still a puppy and needs to be taught how to play nicely. He's a dog and if he were playing with other dogs, he would be biting them. He needs to be taught that biting humans is not appropriate. As for when you daughter picked him up and startled him, that is because he was startled. I've accidentally startled one of my dogs and he turned around and bit me. He's not a biter at all, but he was in la-la land somewhere barking in protection mode at the people walking on the other side of a field and a four lane road when I picked him up to try and distract him, which in turn startled him and he bit me. Have you taken your dog to a puppy class? Maybe taking him to a puppy class and having your kids involved, would be beneficial to all of you, not just him. He will learn to respect your children and your children will learn a few things too.