[kdm]

We rescued Charlie 4 months ago - he is prob between 2 - 3 yrs old. THere was very little info on his background, so I don't know if he had a history of biting. My college-age daughter has been petting him while home on break with no issues. Yesterday she was rubbing his belly while he layed there on his back, seeming to want to be touched, and he turned on her, growled and bit her hand, causing 2 large gashes with his teeth. He snapped at her twice in October but I could see a reason for that. He has been on-and-off snarly with my son. We brought in a trainer for an evaulation and to help us understand and learn how to correct him. Charlie is protective/defensive with his bed so we learned how to deal with that, but this is biting out of the blue, without any provocation. How can I trust a dog that behaves this way? I'm pretty confident he would never bite me or my husband. Waiting for my trainer to get back to me, but not sure where else to go to for help.