We own a lovely 11 year old golden retriever Molly. She is the most gentlest loving girl you will ever find. When the kids come to visit they always bring their dogs as well, we live on 10 acres. Both of the boys have young border collie's Molly hears the cars coming she knows who is who by the sound of the car. When it is one she gets excited and barks because they are bringing hemi out to play but when she hears the other one's car she is off like a shot to hide? They have a boy dog and he is a nuisance, LOL As soon as they drive off home out she comes again from her hiding spot she is so funny.