Grain (Feed):

Full-size horse - $540- $720 (1.5-2 bags per month @ $30 a bag)

Pony or miniature horse- $250- $500 (Miniature will consume 1/5 - 1 bag per month) 

Hay:

Full-size horse - $3,193.75 ($8.75 per bale, up to 1 bale a day)

Pony or miniature horse - $798.44 

Bedding:

Full-size or pony - $3,000 (Less than a bag a day @ $9 per bag)