THE DOG CHARMER Griff Must Learn To ‘Drop-It’ Dear Dog Charmer: We are hoping that you might settle a family dispute. We have a 6-month-old pup who loves to play tug-of-war. Some books advise that tug-of-war is a good game for dogs to play, helping dogs burn energy and gain confidence; this is the side my husband takes. I’ve found that the more our puppy plays tug-of-war, the more she tends to bite; she is very gentle, but uses her…