Colorado Revised Statutes Title 35. Agriculture § 35-43-103. Earmarks

Any stock grower of this state may adopt and use an earmark. Such earmark shall be taken in evidence, in connection with the owner's recorded brand, in all suits at law or in equity in which the title to stock is involved. The earmark shall be made by cutting and shaping the ear of the animal so marked; but in no case shall the person so marking an animal cut off more than one-half of the ear so marked; neither shall anyone mark by cutting an ear on both sides to a point.