Possible Clues:

• Horse's ''lunchbox''
• Horse's "lunchbox"
• Holder of oats
• What a horse eats from
• Item strapped to a horse's head
• Item strapped on a stallion's head
• *Place for oats
• Item strapped over a horse's head
• Item strapped on a horse's head
• It's strapped around the head of a horse