They're used for shooting horses

I believe the answer is:

colts

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'horses' is the definition.
The definition and answer can be both animals as well as being plural nouns.
Perhaps they are linked in a way I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for colts that I've seen before include "Young male horses" , "young players" , "Young stallions" .)

I've seen this clue in The Irish Independent.

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