Showing Teeth a Bad Sign

The second part of the strategy is counterconditioning, where you reward your dog every time your grandson comes around. Give him a dog treat when your grandson comes in the room and show your dog affection the entire time. After a while, he will associate your grandson with rewards such as treats and affection.

At some point, he should be relaxed and wag his tail when your grandson shows up. At that point you can allow very minimal, closely monitored physical contact.