Commercial feeding stuffs containing drug ingredients intended or represented for the cure, mitigation, treatment or prevention of any disease or ailment of livestock and/or poultry, and substances other than feeds intended to affect the structure or any function of the body of livestock and/or poultry, shall be labeled to show, in addition to the other information required by the act:
Provided, however, That the terms "drug" and "substance" as used herein do not apply to vitamin, mineral, or other materials used solely for nutritional purposes, and not present in therapeutic amounts.
Kan. Admin. Regs. § 4-3-9