Colo. Rev. Stat. § 35-44-107
When any person takes into his custody any estray animal and sends a description of the same to the state board of stock inspection commissioners, said person shall be entitled to hold same lawfully until relieved of its custody by the state board of stock inspection commissioners. Should a claimant for said animal apply to the person who has custody of the estray for possession of the same, the said person shall at once notify the state board of stock inspection commissioners in writing of such application, and should the said board be satisfied that said applicant is the rightful owner, it shall forthwith issue an order authorizing said person in custody to deliver the estray to the owner, who may be required to pay any reasonable charges made by said person in custody. In case of a controversy as to what constitutes a reasonable charge, the state board of stock inspection commissioners shall fix the amount. The time of service for which said person may claim remuneration commences upon the date of notification made by the said person to the state board of stock inspection commissioners.
C.R.S. § 35-44-107