Possible Clues:

• Metallic percussion instrument
• Percussion instrument
• Pasture neckwear
• Moo-ring device?
• Hood muffling measure of noise heard in the Alps
• Pasture clanker
• Intimidate inventor that produced neat chime
• A sound aid for those trying to find Hereford?
• It's heard among Alpine herds
• It may be heard in a herd