What happened to my dog?

Philippines
April 4, 2009 12:22am CST
Two weeks ago she was fine, playful and happy. Then all of a sudden she became weak,she refused to eat nor drink, and she just lay on the floor, shivering. Then she defecated black, smelly liquid. Then she died a day later. What happened to her? Even her doctors couldn't tell what it is.
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