Colo. Rev. Stat. § 35-53-114
If any duly authorized inspector finds any livestock, or the carcasses thereof, in the possession of any person, firm, or corporation desiring to transport the same by motor or other vehicle and said person, firm, or corporation in charge of said livestock, or the carcasses thereof, is not in possession of a bill of sale duly executed or cannot furnish other satisfactory proof that said person, firm, or corporation is the lawful owner of said livestock, or the carcasses thereof, or if said inspector has good reason to believe that said livestock, or said carcasses, or any of them, are stolen, said inspector shall refuse to issue the certificate authorized in section 35-53-102 authorizing the transportation of said livestock, or the carcasses thereof, by motor or other vehicle and shall take possession of the same.
C.R.S. § 35-53-114