We have a two and half year old black lab golden ret mix and recently she's started to show aggression towards children including my daughter. She has snapped at several kids and bit my daughters friend (not hard). We aren't understanding why since labs are supposed to be so great with kids and families. She has never been aggressive toward adults. What do I do? We are prepared to give her away but really don't want to as she is part of the family. My kids are so upset about having to get rid of her!