Abstract: Apparatus, systems and methods are provided for trimming a hoof of a horse. The apparatus is an adjustable cutting guide that includes a hoof band configured to extend around the hoof. The hoof band includes an identifier for aligning the hoof band with a mark on the hoof indicating a longitudinal axis of a leg of the horse and a cutting edge providing a cutting plane for a cutting tool. The cutting plane is perpendicular to the longitudinal axis of the leg of the horse. The cutting guide also includes a clamping structure for adjustably clamping the hoof band to the hoof at a user selectable, fixed position above a sole of the hoof when the hoof band is aligned with the mark. The systems include the cutting guide, a marking tool and an alignment tool.