Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to know if your horse is sick [title] Check your horse's basic diagnostics. [step] This means your horse's pulse/heart rate, respiratory rate, and temperature. [substeps] Pulse-the normal heart rate for a horse is 25-42 beats per minute.

Ending1: To check the horse's heart rate, place your palm on the horse's chest just behind the left elbow and feel for the bump-bump-bump of the heart beat. Count how many beats there are in a minute; this is the heart rate. Ending2: Equine, western, and british arabian horses should have pulses that range from 80-100 beats per minute. A western arabian horse might have pulses higher than 120 beats per minute. Ending3: The horse should have a constant rhythm-rapid or slow-at first, then progressively warmer. You may notice rapid or uncontrollable changes-your horse may suddenly bring their heads up-this is normal. Ending4: The heart rhythm is 15-30 beats per minute. Body temperature-your horse takes on a normal temperature of 35-45 beats per minute (unless it is keeping track of how cold or hot you are or has been).

Answer format: ending1/ending2/ending3/ending4