A word about reactivity: it doesn't go away just because they're pulling. When my DH was young, he had an adolescent dog with boundless energy that he used to take roller-blading. He'd go to a flat area with a very long road with no traffic that was basically abandoned on weekends. He'd put the dog in a harness, put on his helmet and pads, crouch down, and let the dog tear down the road at a full run, pulling him on his roller blades.
It was loads of fun -- until the day a squirrel crossed in front of her while she was at top speed. She shifted into prey drive to turn and chase the squirrel, he had no way to stop her because he was on blades flying down the pavement, and she was in a harness, not a prong collar. He took a bad fall and was pretty banged up, but the pads and helmet kept him from serious injury. He decided that speed-skate game wasn't worth the fall risk.
Last edited by Magwart; 02-19-2019 at 10:22 AM.