Sheriff's deputies have seized more than 600 chickens that authorities believe were being trained for cockfighting from a San Bernardino County property.
Authorities say deputies seized about 400 roosters and 200 hens Tuesday morning at the residence in Yucaipa.
The property owners were not there at the time.
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Investigators believe the birds were being sold to Mexico to compete in cockfighting derbies.
Deputies and animal control officers were acting on a tip from the Humane Society.
Humane Society law enforcement specialist Eric Sakach says the operation was written about in a cockfighting magazine.
Sheriff Rod Hoops says his Rural Crimes Task Force ``will not allow this blood sport to flourish.''