I have been taking Ruger to puppy obedience class for a few weeks now. Part of the class is socialization with other pups all pups are less than 5 months old. Ruger is usually pretty aloof and does not readily join in wrestling with the other pups. Last night there were some new pups that were a larger breed (St Bernard type breed) as one of them approached Ruger he let out a shrill yelp and voided his bladder on the spot. At 4 months old Ruger is 22" at the shoulder and weighs nearly 50 lbs so he is not a little pup. He plays with a smaller dog (15 lbs) at home all day long so he is used to being around other dogs. He has never been beaten or mishandled so I am just curious if others have had this experience?