It's only been two weeks since Teddy, one of the American bison that lived in Golden Gate Park, became ill and was euthanized. Today, SF Gate brings word that this morning a second buffalo was put down. At 28 years of age, Pretty Old Cow was the oldest of the all-female herd. Zoo experts had watched her health deteriorate over several months, and made the decision to euthanize her. This fall a number of new bison will be bought to replenish the herd. [SF Gate/photo via Paul Turner]
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