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A new pan-industry group, the first of its kind worldwide, has been formed to tackle the increasing threat that wormer resistance poses to horse health and the equine industry. Top riders Piggy March, Miri Hackett and Anna Bridges gathered at the National Equine Show, Birmingham 4th March 2023 with CANTER representatives to support the launch of this new initiative.

Termed CANTER to communicate the urgency of its crusade, Controlling ANTiparasitic resistance in Equines Responsibly brings together voluntary representation from the widest reaches of the sector. These include leading experts in the field across prescribers, diagnostic providers, pharmaceutical companies, trade organisations, technical experts, horse owners, charities, and policy makers. All recognise the critical consequences of antiparasitic resistance and the need for coordinated action to slow the development and maintain efficacy of our limited treatments.

It recognises that antiparasitic resistance (AR) in equine parasites has critical health, welfare and husbandry consequences and coordinated action is essential to maintain future antiparasitic efficacy and slow the development and spread of AR. CANTER’s initial focus is resistance in equine internal parasites.

CANTER stakeholder organisations

CANTER was formed subsequent to several stakeholder engagement events to discuss the present problem of AR in equine internal parasites with representatives from across the equine industry. These events resulted in positive and collaborative discussions on how to progress solutions to tackle this critical issue and there was much enthusiasm and support for industry-wide action and follow on activities.

The CANTER core steering group comprises of approximately 20 representatives from across the equine sector with an active interest in the sustainable control of parasites in equines. Many organisations contributed to the development of CANTER including:

  • Prescriber groups
  • Diagnostic providers
  • Pharmaceutical companies
  • Retail/trade organisations
  • Veterinary associations
  • Parasitologists
  • Horse owners
  • Charities
  • Guidance/policy makers


CANTER aims to lead a coordinated approach to antiparasitic use and stewardship to combat AR in equine parasites in the UK. It will:

  • Support and promote industry-wide action on parasite control in equines
  • Provide the best available, evidence-based guidance and information on sustainable, responsible, and practical strategies for parasite control in equines
  • Deliver proactive and appropriate communications
  • Identify knowledge gaps and opportunities to address these gaps
  • Promote effective use of diagnostic and monitoring tools
  • Support a consistent approach to parasite control across the equine community
  • Be a ‘single source of truth’ for the equine community on issues related to antiparasitic resistance in equines

The equivalent UK organisations for sheep and cattle are The Sustainable Control of Parasites in Sheep (SCOPS) and Control Of Worms Sustainably (COWS), respectively.