Colic & horse pulse

How does colic typically progress?

Early/mild: restlessness, looking at the abdomen, pawing, reduced appetite, some rolling. It can come in waves.

Increasing/moderate: more frequent attempts to roll, sweating, increased breathing, obvious pain.

Severe: persistent pain (cannot be “distracted”), dullness between pain episodes, bloated abdomen, possibly absent gut sounds, worsening despite pain relief → more concerning.

Late/critical: collapse, very cold legs/ears, dark or pale mucous membranes, slow capillary refill → signs of circulatory compromise.

What does it mean for the horse’s pulse?

Normal resting pulse for an adult horse is typically about 28–44 beats/min.

With colic:
Pain/stress → adrenaline → pulse increases.

Dehydration / “third spacing” (fluid shifting into the intestines) → lower blood volume → pulse increases.

Endotoxins/inflammation (e.g., with strangulation/bowel injury) → circulatory collapse / shock tendency → pulse often rises markedly.

Rule of thumb levels:
40–60: mild to moderate pain – should be taken seriously and assessed.

60–80: often more serious colic or significant compromise → call the vet now.

>80: high risk of a severe condition (e.g., strangulation/shock) → emergency.

Important: The pulse can temporarily drop if the horse becomes exhausted/dull, but that is not a good sign — it may indicate impending collapse rather than improvement.

Practical: how to use pulse correctly

Measure again after 10–15 minutes of calm (not right after rolling/walking).

Look at the trend: a rising pulse over time is more concerning than a single number.

Combine it with: mucous membrane color, capillary refill time, temperature in legs, breathing, pain level, manure output.