Australia's resource for control of worms, flies and lice in sheep, |
When it comes to levamisole-resistant worms, you would need to give a dose big enough to kill the sheep, before it would kill the resistant worms. Double-dosing sheep is not the way to manage drench resistance.
This 3-question quick quiz tests your knowledge of sheep parasites and their control.
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Predictions for a good spring also mean increased potential for worm and fly parasites to stymie production. For instance, while animals can look good and put on weight, a non-clinical worm burden without the obvious signs of infestation such as dramatic scours, weakness or deaths of sheep, can reduce weaner growth rates by 30%, making the cost of worm testing small by comparison.
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