And what that means for your flock
The science of lamb pain is clearer than ever. Here’s what progressive farmers and their advisers need to know.
What the Research Actually Shows
The rubber ring has been a fixture of British sheep farming for generations. Cheap, quick, and familiar — it’s hard to argue with that combination when you’re working through hundreds of lambs during the season.
But familiarity isn’t the same as best practice, and the scientific evidence on rubber ring pain has been building for some time now.
The perception that rubber rings are “low-pain” or that lambs simply “get used to it” doesn’t hold up to scrutiny. Independent trials carried out by SRUC, led by Professor Cathy Dwyer — one of the UK’s most respected animal welfare scientists — measured behavioural pain responses in lambs undergoing different castration and tail-docking methods. The findings were unambiguous: rubber rings cause a prolonged pain response lasting several hours, driven by progressive ischaemia as blood supply is progressively cut off to the tissue. The animal cannot habituate to this kind of pain – it simply endures it.
This isn’t a niche academic finding. It’s the reason the Farm Animal Welfare Council has long flagged rubber rings as a welfare concern — and the reason regulators are now beginning to act.
A Different Mechanism Entirely
ClipFitter works on an entirely different principle to rubber rings.
The system was conceived by Professor Vince Molony, an internationally recognised expert in animal pain with over 35 years of research and who taught many of today’s top vets at the Royal Dick Veterinary School in Edinburgh. The ClipFitter fitter uses blunt blades to crush and sever the nerves at the application point instantly, producing an immediate and permanent nerve block. The tissue beyond the clip point has no nerve supply, resulting in no progressive pain response.
When SRUC tested this in independent trials, the result was striking: pain and stress levels in lambs treated with ClipFitter were indistinguishable from those in uncastrated lambs in young lambs.
“Pain and stress levels in ClipFitter-treated lambs were indistinguishable from those in uncastrated lambs in younger lambs.”
That is a significant conclusion drawn from independent scientific research, which is why it has earned recognition from the British Veterinary Association, the Sheep Vet Society, AHDB, Quality Meat Scotland, NFU Cymru, the Soil Association, and SRUC itself.
Where the Law Stands — and Where It’s Heading
ClipFitter has been legal in Scotland for lambs up to three months of age since 2022. That change was underpinned by the welfare evidence above and by sustained engagement with the Scottish Government.
In England, Wales, and Northern Ireland, the current position is more restrictive: rubber ring and emasculator use is permitted under seven days of age, with the Burdizzo the only authorised method thereafter. In practice, many hill farmers — where lambs are born in the field and are not always brought in within a week — face a real compliance gap that the current rules do not adequately address.
DEFRA’s Animal Welfare Committee has formally endorsed ClipFitter and recommended that legislation be updated by 2028. A public consultation on proposed changes closed in March 2026, with the government now reviewing submissions. The direction of travel is clear — and farmers who act ahead of regulation, rather than waiting to be compelled, will be better placed for what is coming.
What This Means for Farmers and Their Advisers
Farm assurance standards are tightening. Retailers are asking harder questions about welfare evidence. Vets are increasingly being called upon to advise not just on compliance but on genuine best practice.
ClipFitter provides a practical, scientifically validated answer to those questions. The system is available in Mini, Midi, and Maxi sizes to cover different ages and weights, with both standard and biodegradable (plant-based, no microplastics) clip options. It works for both castration and tail docking.
One point worth highlighting for advisers: on very young lambs, tails can detach rapidly after clipping. Pairing ClipFitter with an appropriate antibacterial wound spray — such as NoBacz, also available through Covetrus — provides a sound post-procedure protocol that addresses both pain management and infection risk in a single workflow.
A Final Thought
I have been working on this for many years, alongside Professor Molony and a small, dedicated team of engineers and materials specialists. What drives us beyond simply commercial opportunity is a genuine desire to solve the problem of unnecessary pain being inflicted on millions of lambs every year – a problem not caused by negligence, but simply because better options have been in short supply.
But times are changing, and more welfare-friendly alternatives, including ClipFitter, have arrived.
If you would like to learn more — whether as a vet, a farm trade professional, or a farmer — please visit www.clipfitter.co.uk, where you can find the full product range, the supporting science, and details of how to get started.
Brian Eadie | Founder, ClipFitter
Available through Covetrus