We've now had our dog for two weeks. He is a 2 year old rescue and from what I can tell he is a chihuahua/terrier cross. Normally he is fine with our kids, and he is fine with the day care kids my wife has coming every day. Besides the odd low growl when my kids come near his toys while he's got one, (discussed in my previous post) there has not been an act of aggression. Today, however, he got quite upset at my daughter when she was trying to take off his jacket (its cold here.. very very cold) after he came in from a potty break - an act she has done many times already. Today, he did a little more than nip at her. I can't say it was a full on bite, but definitely more force than a nip. Do you think there is a cause for worry here? I don't want him to bite one of the kids.