Subtract to Succeed

Subtract to Succeed

Day 38: Just Enough

What horses know about the minimum effective dose

Feb 28, 2026
∙ Paid

🎵 Today’s song: River — Leon Bridges

As promised, I’ve got a more robust than usual post today.

Horses are prey animals. They’re also one of the most successful mammals in the Earth’s 4.5 trillion years of evolution. Horses have survived more than 50 million years of evolutionary pressure — predators, climate shifts, tectonic upheaval.

So the wisdom they offer us is natural. They’ve earned it in the process of learning to survive these attacks and crises.

Conserving energy is perhaps first among these evolutionary adaptations that have enabled horses to thrive.

Unlike bears, they don’t hibernate. Unlike sloths, they don’t opt out. They live in complex herds. They stay alert, sleeping only a few hours a day, often standing up. They flee when necessary.

Their genius lies in calibration.

A horse identifies the desired result — protect the hay, guard the foal, escape the mountain lion — and then does the least effortful thing that might reasonably achieve that goal.

Not nothing. Not everything. Just enough.

Take food protection.

When another horse approaches the hay one is enjoying, the first horse will often begin with a twitch of the ear — a nearly imperceptible signal.

Frequently, that’s enough.

white horse on brown dried grass field during daytime
Photo by Mary She on Unsplash

If it’s ignored, the message escalates: a skin shake, a tail swish, a shift in posture.

Only after multiple subtle signals fail will the horse consider biting or kicking.

Escalation is possible, but it’s not their default.

Imagine if you and your colleagues, or family members, approached conflict this way.

No raised voices, ALL CAPS, or dramatic over reactions, if or until they became actually necessary.

How much energy would you conserve?
How much goodwill?

This is what minimum effective dose looks like in the wild.

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