welfare evidence library
Good questions, followed all the way down.
The industry asks. We read the evidence — across every layer, including the ones the conversation tends to avoid — and set out what it says.
how we weigh the evidence
A number rarely tells the whole story.
The Changing Rein Evidence Library gathers research on horse welfare and reads it through the lens of the Horse Welfare 12. If you’ve read our HW12 Field Guide, you’ll recognise the logic: most welfare research — and most of the public conversation — concentrates at the surface, on parameters. Parameter-level research measures what can be measured, and it builds essential evidence. But a number on its own rarely tells you whether a practice should continue, and rarely shifts the system that produced it. So when we take on a question, we ask where the evidence sits across three layers — and we treat none of them as sufficient on its own.
THE PHYSICAL EVIDENCE
What does a practice do to a horse's body — and does it work?
The physical layer asks what a practice does to the horse’s body — does it cause injury or pain, and does it achieve what we think? This is where the science is strongest and most familiar, and it matters. But it has a ceiling.
THE MENTAL-STATE EVIDENCE
Not just whether it hurts — how it feels.
The affective layer asks what the horse experiences mentally — not just whether something hurts, but whether it produces fear, frustration, helplessness, or distress. Drawing on the 5 Domains model, this layer takes the horse’s mental state as a welfare outcome in its own right. It is less studied, often harder to measure, and frequently the most revealing — and it is routinely skipped over in a debate that stays fixed on the physical.
THE SOCIAL EVIDENCE
What the public sees — and where social licence is won or lost
The social layer asks what a practice means or might symbolise — it includes what the public sees, what the practice tells us about how the industry regards the horse, and whether it sits comfortably with the values of the society the industry depends on. This is the deepest band of the HW12 — intent and paradigm — and it is where social licence is ultimately won or lost. A practice can clear the first two layers and still fail here, because meaning does work that measurement cannot capture or neutralise.
We read the evidence this way not to reach a predetermined conclusion, but because a complete picture requires all three. The physical and affective evidence tells us what is happening to the horse; the social dimension tells us why, in the end, the public — whose trust the industry cannot do without — may decide the matter regardless. Curiosity over confrontation means following the evidence across every layer, including the ones the conversation tends to avoid.
The questions
Every question here came from someone in the industry — a practice they were unsure about, a claim they kept hearing, a debate that never seemed to resolve. Here is our read of the evidence and what it says.
What is the whip for - and does it do what we say it does?
Why do we use tongue ties - and do they do what we think?
Cold water on a hot horse - does it help or harm?
We read every question that comes in.
We can’t take them all — but if yours becomes a library entry, we’ll let you know, and we’ll credit you if you’d like us to.
Ask a question
Got a question the evidence should answer?
This library exists because people in the industry asked.
If there's something you've wondered about -- a practice you're unsure of, a claim you keep hearing, a debate that never seems to resolve -- send it to us.
Changing Rein
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