WASHINGTON The tiger speared his prey with a claw and dragged it across the grass. The animal ripped it open, inhaled its scent, chewed its innards. Sniffing the air around him, he dived in for another helping. The prey actually was a frozen ball of animal blood wrapped in burlap, and keepers at the National Zoo threw it to their male tiger, named Rokan, to offer him a more savage feast than his usual ready-to-eat diet. Behind Rokan's unusual meal is a concerted attempt by zoos to introduce more of the wild side into captive life. Some facilities, pushing this idea to its controversial limit, feed roadkill to their carnivores in public view. At the Folsom City Zoo in Northern...
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