Colorado Revised Statutes Title 35. Agriculture § 35-54-103. Requirements of bill of sale

(a) Horses or mules, age, color, and sex, with special markings, including all iron brands carried;

(b) Registered cattle, registration number tattooed in ear, name, sex, breed, brand, and marks, if any;

(c) Range cattle, sex, age, breed, brands or earmarks, wattle or dewlap, horned or dehorned;

(d) When the sale or transfer involves neat cattle carrying one or more Colorado recorded brands, the cattle shall be tallied for brands, and the brands described in the bill of sale, giving location on the animal of all Colorado recorded brands;

(e) Sheep, number, breed class, ewes, rams, wethers, lambs, paint brands, firebrands, and earmarks.