Iowa Code § 581.2A: Lien created.

A veterinarian shall have an agricultural lien as provided in section 554.9102 for the actual and reasonable value of treating livestock, including the cost of any product used and the actual and reasonable value of any professional service rendered by the veterinarian. The veterinarian is a secured party and the owner of the livestock is a debtor for purposes of chapter 554, article 9. The lien applies to the livestock treated by the veterinarian.