Strategic drug-based worming
Strategic drug-based worming unavoidably places more selection pressure on worms than targeted worming, so is associated with a higher risk of contributing to the development of resistance.
However, we recognise that targeted worming programmes are not suitable in all situations, for example foals and youngsters or when pasture management is particularly poor. We may therefore recommend a strategic drug-based worming programme, focused on managing current parasitic disease risks.
We carefully consider the risks, and design drug-based worming programmes to provide effective treatment whilst minimising resistance as far as possible:
- Wormers are correctly timed to be given after the ERP (egg-reappearance-period) of the last wormer (minimising resistance risk).
- Some worms (immature stages) will be left untreated by wormers and therefore contribute to ‘refugia’, going some way toward maintaining a population of parasites on the pasture that have not been exposed to selection pressure.
- All significant types of worms will be treated.
- If we are familiar with your horse we can advise on the correct dose.
- We can provide tips, or assist with administration to ensure the full dose is swallowed; seeing a teaspoon sized blob that the horse has dropped can be as much as the whole wormer.
- FWEC reduction tests to ensure wormers have been effective and identify any early signs of resistance developing.