The 3mm Stainless Steel Prong Collar with Toggle from Herm Sprenger is the latest offering in their prong collar line

Play and tug with him

the entire protection work becomes a kind of Hope Run for the dog

If a dominant dog collar is too large it will not be as effective for training

Shaggy Puppy Flirt Pole training vest The 3mm Stainless Steel ProngToy color may vary For puppies 6 months and younger Excellent for prey drive building [split] The Redline K 9 Shaggy Puppy Flirt Pole is excellent for building drive in puppies. The Lexan flirt pole allows for realistic simulation of prey movements and is strong enough to support tugging with spirited dogs.