Ohio Rev. Code § 919.11
No person shall mix horse meat with the parts of any other animal, sell, offer, or expose for sale any such mixture for human consumption within this state.
No person shall sell for human consumption the tongue, diaphragm, heart, esophagus, lips, ears, or glands of a horse, nor shall these parts of a horse be included in a horse meat food product intended for human consumption.
Any horse carcass, horse meat, or horse meat food product sold, offered, or exposed for sale, which is unlabeled as to use or is labeled as pet or animal food, shall be decharacterized with charcoal or green food dye. Suggestive pictures or designs on the label shall be considered as indicative of the use of the product. However, any horse meat or horse meat food product whose label bears an approved inspection stamp, or which is packed in hermetically sealed, retort processed, conventional retail sized container, is labeled as pet or animal food, and is licensed under sections 923.41 to 923.55, inclusive, and 923.99 of the Revised Code, need not be decharacterized.
R.C. § 919.11