Treating ewes pre-tup with 1.5ml of Flexidine, an iodised peanut oil, has widely been regarded as the best way to provide long-acting, cost-effective protection against an iodine deficiency. But two past field projects produced results that questioned the validity of the long-acting effectiveness of this method.
Sheep farmer Chris Hunter, left, with vet John Smart of Clutha Vets. The Hunter farm, along with 100 of their two-tooth ewes, formed the South Island part of the iodine field trial.
