Don't get me wrong, leashes on collars are great, especially if you want to determine where the puppy's head and snout is and should go, or you need something to pull the ass back onto your cock during a fuck, but a leash on the cage also has it's advantages. Especially if it's just about the sub walking nicely in front of you and you want to exercise dominance and control. Not that @PupNailixAD could run away with the ankle cuffs, or would ever do that at all. But it's still fun and feels good to hold a leash that's attached in a different way.
We posted the full 15 min video on our JFF two weeks ago~