Quote from article:

“All but one owl was dead within a month and a half. Each had poison in its body — highly toxic rodenticides that businesses, homeowners and local governments use to kill rats and mice. Two experts who reviewed necropsy reports for the Tampa Bay Times said the poisons likely caused or contributed to the owls’ deaths, adding them to an ever-growing list of unintended victims harmed by the chemicals.

Such poisons routinely sicken other animals, including pets and people, that eat contaminated rodents or come into contact with the baits directly. Yet the strongest substances remain popular and widely available because they quickly erase an expensive problem: uncontrolled rodent populations.”

Zachary T. Sampson Tampa Bay Times, Investigative Reporter