It's lovely to meet other dogs while walking your dog in the great outdoors. But dogs should learn how to meet & greet politely, without lunging at other dogs her people and not to be right in the face of each other. Many times the over excitement can be due to a lack of experience from the dog, lack of proper socialisation skills and so forth... Dogs shouldn't play while on leash with each other, otherwise it'd encourage them every time they see another dog on the street to