Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to draw a horse's blood [title] Prepare the horse. [step] Make sure that the horse is properly restrained and is in a docile temperament before proceeding to take a blood sample. For blood collection, using a halter and rope is sufficient.

Ending1: Ask someone to assist you in restraining the horse by holding the part of the rope attached to the tie ring. [title] Using gauze soaked in alcohol, wipe the jugular furrow of the horse. Ending2: How this step is accomplished is dependent on the function of blood and the horse's body type. [substeps] The halter needs to be large enough and wide enough to fit over the horse's body. Ending3: [substeps] A set of cornline markers will also be handy. This will expose the horse's muzzle and the core of its larynx while drawing blood. Ending4: Also make sure that there is at least an inch of rope not entangled in anything that would contain blood, such as leather, wire, or split wood. [substeps] Make sure that the halter is securely covered, as you do not want to bruise the horse.

Answer format: ending1/ending2/ending3/ending4