Dethyse - Tracking, obediance, and protection sports training and competition products. - http://www.dethyse.com/
Harddog's Requisites - Selling bite suits, sleeves and muzzles for police, military, dog sport and personal protection training. - http://www.harddogs.com
Signature K9 - Specializing in protection sport and conditioning equipment for dogs and decoys, also offers general supplies and a selection of products for gun dogs. - http://www.signaturek9.com/
ForDogTrainers.com - Producer of protection training equipment, including bite suits and tags, Schutzhund dumbbells, harnesses, muzzles, and collars. - http://www.fordogtrainers.com
Blackthorn - Supplying equipment, clothing and accessories for all protection sports. Illustrated catalogue and descriptions. - http://www.blackthornk9.com/