tall big dog

This is the dog I was telling that was hanging out in my yard that Kelly's wife gave her son. Kelly's wife was here and I ask what kind of dog this was? She said he was a great Dane. She began to tell me that this dog would kill all other dogs that came into his yard when he got his territory established. Now I begin to [plan on working a way to make him right at home then turning all these dogs we have out so he would kill them but then she said he wouldn't kill any dog that was suppose to be there. Oh, heck! all my plains gone. Maybe she might have been telling a tall tale about a tall dog?