Hi. Am feeling very sad and confused, as I am sure our Lab is tonight too. Long standing friends who know our dog well came to our house tonight for dinner, as their daughter approached our gate on her scooter wearing her helmet, she put her hand through the gate to stroke our dog and he bit her fingers. She says he didn't growl... He is very vocal when people walk past the property and does bark if people approach the gate \ front door. Any advice v gratefully received. Is he just protecting our property??