Temperature, pulse, and respiration — TPR — are the three numbers that turn 'he doesn't seem right' into information a vet can act on over the phone. Every owner can take them with cheap equipment and a little practice, but they only mean something against a baseline: the time to learn your horse's normal figures is a quiet afternoon when he is perfectly well, not the night he is pawing at the ground.
Why baselines beat textbook numbers
Textbook ranges are wide because horses vary. A resting adult typically reads between 99 and 101.5 degrees Fahrenheit, pulses between 28 and 44 beats a minute, and breathes 8 to 16 times a minute — but your horse may live at the bottom of all three ranges, in which case a reading mid-range for the textbook is high for him. Weather, excitement, recent exercise, and even a hot stable push every figure up, so baselines should be taken at rest, in normal conditions, ideally a few times across different days. Foals and young horses run higher pulses and breathing rates than adults, another reason individual figures beat general ones. When you ring a vet and can say 'his temperature is a degree and a half above his normal and his pulse has doubled', you have handed over a diagnosis-grade clue instead of an anxiety.
Temperature: how to take it safely
Use a digital large-animal thermometer, switched on and given a smear of lubricant or a little petroleum jelly. Stand to the side of the horse's hindquarters, never squarely behind, lift the tail gently with one hand, and slide the thermometer into the rectum at a slight upward angle until the tip is well in and resting against the rectal wall — a tip floating in a ball of dung reads the dung, not the horse. Hold it there until it beeps, keeping a grip on it throughout; thermometers have been lost inside horses by owners who let go. Read it, wipe it clean, and disinfect it before it goes back in the kit. If the horse objects strongly, stop and try again with a helper holding him — a wrestling match produces a useless reading and a lasting grudge.
Pulse: jaw, fetlock, and what it tells you
The easiest pulse point is the facial artery, which crosses the underside of the jaw in a groove you can find by running your fingers along the jawbone until you feel a cord-like vessel that beats under light fingertip pressure. Count for fifteen seconds and multiply by four. With practice you can also feel the digital pulse at the back of the fetlock, which matters because a strong, bounding pulse in one foot is a classic flag for trouble inside that hoof. Rate is only half the information: a pulse that is weak and thready, or hammering hard, tells a vet something different from the same number felt normal and steady. Check the pulse at the same quiet moment as the temperature, because a horse who has just been chased around the field will show you his exercise figures, not his resting ones.
Respiration: the quiet count
Stand back and watch the flank, counting one full rise and fall as one breath, again over fifteen seconds multiplied by four — or over a full minute if the horse is breathing slowly and you suspect the count matters. Watch from a distance first, because many horses hold or alter their breathing when they feel observed up close. Note the character as well as the number: nostrils flaring at rest, a grunt at the end of the out-breath, a heave line working along the belly, or one side moving less than the other are all findings to report. A resting temperature climbing above about 102.5 degrees, a resting pulse well above its normal that does not settle, or laboured breathing in a standing horse are the figures that mean phone the vet now rather than after breakfast. Record your horse's normal TPR in KinsLe's Pet Passport and keep it there beside his vaccination dates, and every future worry gets measured against the truth.