I have been wanting to get something like that for Finn. He likes to take off in random directions, though, when we're just jogging...after leaves, squirrels, people, dogs, you name it. Would it prevent that? Or do I need to wait til he's a little older and calmer? I know, Glacier, that you said Kayleigh can't get into it with another dog while she's on the springer, is that because she doesn't try at all since she's running with you, or because the springer actually prevents her from doing it?