The flirt is a great tool in my opinion. I use it like a bullfighter with the red flag. Start when dog is away from you,letting it sprint towards the flirt. Lift & while it is sprinting past you go the other way. Same again after that. Watch your dog & alternate between walking a length & sprinting a length,once you see it needs that recovery.
I don't do the circles or anything,just sprinting,as I would be wary on the dog hurting itself.
Pups you can start chasing the flirt in whatever direction as a game for themselves. Nothing serious,just playing & enjoying themselves.
I use an 8ft fishing rod with the eyes taken out. Tied up leather strap on end.......