Bird flu has been on the rise in Washington state and one sanctuary was hit hard: 20 big cats – more than half of the facility’s population – died over the course of weeks.

The animals - including a Bengal tiger, cougars and bobcats - have died of the virus over the past several weeks.

A wildlife sanctuary in Washington announced it is going into quarantine until further notice after 20 big cats died due to bird flu infections. The Wild Felid Advocacy Center in Shelton, Washington,