Chicago police said the 15-year-old boy unlawfully entered a yard in the 5200-block West Newport Avenue.
The teen then allegedly "intentionally" killed a duck and a chicken, police said.
Police said they arrested the teen on Tuesday in the 3000-block of W. Harrison Street.
He is facing two felony counts for aggravated cruelty to animals and one misdemeanor for criminal trespass.
Chicago police did not release further information.
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