I agree with crofab. Start them young with the flirt pups are always wanting to chew and chase things. Get them use to the tool and when they get tired they'll just stop and go take a nap. No risk hurting them by keeping it low.

This can later be transitioned to a springpole once they get a hang of the flirt but honestly I don't care too much if a dog/pup doesn't really care for the springpole as I dont use it much.