1st time is group session. 1st time using starmark collar. Also not as used to the muzzle. lunging at other dogs wanting to interact. But toward the end started reacting only when the other dogs reacted to him. Got scared and wanted to create distance when other dogs got behind him. Wanted to run away 1/2 hour in-was avoiding the situation/conflict -he would rather go back to the "safe room" . He was not completely shut down as he was taking treats from me. improved toward end-walking nicely next to me and ignoring other dogs. I was working on leash handling skills, switching hands, getting better at leash pumps, most important situational awareness...looking around every corner and not having mason forge ahead.