Iowa Code § 189A.20: No inspection for products inedible as human food.

Inspection shall not be provided under this chapter at any establishment for the slaughter of livestock or poultry or the preparation of any livestock products or poultry products which are not intended for use as human food, but such articles shall, prior to their offer for sale or transportation in intrastate commerce, unless naturally inedible by humans, be denatured or otherwise identified as prescribed by regulations of the secretary to deter their use for human food.