The second grazers had become more problematic and the dosing frequency had been
increased to include repeated dosing on a monthly basis during the housed period due to
apparent lack of efficacy and partial responses to treatment.[...] for this to work in practice,
there has to be significant education of vets, SQPs and farmers on the need to have an
effective, credible health plan, based on best science, which clearly defines the surveillance
strategy and ensures that any wormers used are regularly tested for efficacy.