Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to bridle a horse [title] Check that you have the correct bridle size. [step] If this is the first time you're using this bit on this particular horse you should be sure that you're using a proper sized bridle. If it's the wrong size it will make the horse uncomfortable.

Ending1: The horse would make a fuss if he or she spots you using the correct sized bridle, but will generally respect it. Often, the owner will make the mistake so if this is your first time using this bit use a bit bigger in size. Ending2: [substeps] Bridles comes in three sizes: pony, cob or arabian, and full. Measure your horse's head from the center of his poll to the corner of his mouth, and compare this measurement to the crown and cheek piece of the bridle. Ending3: A good rule of thumb is to get it as close to its rear as possible. [title] Inspect the position of the ball of the hoof. Ending4: Adjust your girth or attitude as needed to ensure that the horse is standing comfortably at your head and that you are not inadvertently tightening the girth. [title] Hold the reins with one hand while bending the rein toward the horse's nose.

Answer format: ending1/ending2/ending3/ending4