Okla. Stat. tit. 4, § 4-341: Livestock shippers - Right to furnish feed

In all cases wherein any shipper of livestock has contracted

with any person, firm or corporation for the use of feeding pens or

impounding pens in stockyards in the State of Oklahoma wherein said

lessee keeps livestock for the purpose of disposing of the same to

packing plants or otherwise, said lessee shall have the right and is

hereby authorized and empowered to furnish feed for the purpose of

feeding said livestock without purchasing the same from the lessor

of said pens or any other person.