Add Yahoo as a preferred source to see more of our stories on Google. The animals all began showing signs of acute illness minutes after the dye, used to help with identification, was applied, ...

PHILADELPHIA (AP) — The sudden deaths of all five meerkats at the Philadelphia Zoo this month were apparently caused by an accidental poisoning linked to a dye that is used to mark the animals, zoo ...

Add Yahoo as a preferred source to see more of our stories on Google. Five meerkats died at the Philadelphia Zoo last week after they were exposed to an unknown toxin from a dye routinely used to ...

PHILADELPHIA (CBS) - The Philadelphia Zoo is trying to solve the mystery surrounding the deaths of five of its meerkats. They say all five died this month because of an unknown toxin. The meerkats ...

The animals all began showing signs of acute illness minutes after the dye, used to help with identification, was applied, according to the zoo Erin Clack is a Staff Editor for PEOPLE. She has been ...