All Philadelphia Zoo Meerkats Die from Accidental Dye Poisoning

Five meerkats at the Philadelphia Zoo died suddenly after being exposed to an unknown toxin believed to be from the dye used to mark the animals.
The dye, Nyanzol-D, had been used for over 30 years without any issues until now.
An investigation is underway to determine how the long-used dye suddenly became toxic.
The meerkats were the only ones at the zoo, leaving their exhibit empty.
Necropsy results on the meerkats are pending to confirm the cause of death.