Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to train a horse to shake a hoof [title] Use a driving whip or a riding crop. [step] To get your horse to master raising his leg, you will need to use a driving whip. You may already have a whip that you use to train your horse.

Ending1: Your horse should be comfortable learning new tricks with the aid of a whip and act calmly around the whip. [substeps] Another option is to use the rubber end of your riding crop. Ending2: [title] Get your horse to stand and advance slowly. [step] When the horse is not yet walking or trotting on the ground, use a riding whip or (if this is the case) a riding crop to speed up your horses gait. Ending3: If not, start with a riding whip and purchase a riding crop. [substeps] Buy a riding crop that is 9 " (25 cm) wide or 12 " (30. Ending4: If not, you may choose to use a riding crop with a flat handle instead. [substeps] While you may use a riding crop to train, it isn't necessary to use one to train your horse to shake a hoof.

Answer format: ending1/ending2/ending3/ending4