To castrate a cockerel in order to fatten it for table use.(verb)
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Use "caponize" in a sentence
"To illustrate: the injection of estrogens will caponize a rooster just as castration (removal of androgens) will."
"The white Plymouth Rocks we can caponize and easily sell, and the white Leghorns we will either have to kill and sell as broilers, or it may be we can sell them to the farmers around here to improve their flocks."
"_The best time to caponize the cockerel_ is when he weighs between two or three pounds."