A disturbing clue

The next afternoon, Kathy discovered a small pigeon carcass near the back steps while raking leaves. It had been mauled but not eaten, as though attacked for sport. She felt a chill run through her body as she thought of the hatchlings’ near escape. Could they have killed it? That night, the glow of their markings seemed even brighter, and Kathy wished she could end this experiment entirely.
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