These students at Smedley Station are drenching sheep in the sheep yards. Using a drench gun, they are applying an anthelmintic dose into the throat of each sheep to kill internal parasites. People sometimes confuse drenching with dipping, which involves applying a chemical solution to kill external parasites, often by getting the sheep saturated. Nowadays, external parasites can be killed by using a drench gun to apply a dose of chemical along the back of a sheep.
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