So tonight was the first night of intermediate classes. They let Sampson come back for a refresher for free (Pretty cool). Anyway, the last two times in beginner class, Lucy growled and advanced towards three different dogs. So, this time, I told my husband to take Lucy and I would take Sam. Well, as part of the training, they had a stranger come up to meet the dogs. He was a very large muscular built Asian man. The man came up to Sam and tried to put his hand on top of his head. Sam growled...Mind you, Sam has never ever growled or acted aggressive toward anyone before so I was shocked. Then he did it again... A large black man with a bunch of bags approached us and he growled. So the trainer asked Steve to take Sam and go by the man again, so we switched dogs and my husband took Sam. No only did he walk up to the man wagging his tail but he let the man give him a treat...What the Heck am I doing wrong????? I am getting a major complex here....