I am currently looking for a playmate for my 11 month old male Jug (Jack Russell/Pug). Right now he is such a crazy dog and loves to play every second my wife and I are home. We were hoping to get a dog that would be able to keep up with him, but maybe also be able to calm him down a little. We are looking for another dog about the same size, he is about 16 pounds now. I've heard that getting a female would help since there would not be any dominance issues. Also I've heard to avoid getting another Terrier for the same reason. Does anyone have any reccommendations on breed and sex? Any help would be greatly appreciated.