The president of the Pittsburgh Zoo and PPG Aquarium defended the use of dogs to help herd elephants Wednesday after a group of animal activists called for the zoo to have its accreditation revoked. FREE APPS | NOW | FACEBOOK | TWITTERStories of the day...Kraft recalls 242,000 cases of Mac and CheeseWATCH: Family shocked when newborn 'girl' turns out to be...
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