The traditional whistle used by the English Shepherd to command his faithful sheepdog to round up and bring home the straying sheep. Used by professional dog trainers for many years, this whistle does require a few practise blows before you get a sound, but once one sound is achieved, it will be an easy asset for your sheepdog training.Shepards Mouth Whistle FeaturesAcme dog training whistlePlastic Shepherds Mouth WhistleControlled range of pitchesAcme\'s Ref.MPN: ACSMPBLColour: BlackSizes: One SizePM Ref: 409466