Final answer:
Stock owners use practices such as keeping birds/fowls to control external parasites.
Explanation:
Stock owners use various management practices to control external parasites. One common practice is keeping birds and fowls around kraals and drinking points, which helps in parasite control through natural predation. Additionally, sanitation practices such as removing plant residues or eliminating alternative hosts can also aid in reducing parasite populations.
Learn more about Livestock Parasite Control here:
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