I have one those retractable leashes and I practice all the time by calling him and when he comes over I give him a treat. However his ears seem to be clogged when he's around other dogs and I have to call him more then once. And when I let him off the leash again this morning , he started to go over to people to people to be petted, but I'm scared someone would try to take him, so I have to figure out a way to stop him from doing that. So we still have work to do.