Researchers puzzled over spike in sick sea lions

By John Boxley, Producer, NBC NewsSAN PEDRO, Calif. -- Along Southern California's pristine coastline, ailing sea lions are turning up in record numbers."We have a lot of little pups this year," said veterinarian Lauren Palmer, who is nursing them back to health. Most are about eight months old, she said, and appear dehydrated and malnourished, having trouble adjusting to life away from mom. For s...

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