Dozens of cats across the U.S. have tested positive for avian flu, federal officials say. The west coast has been hit especially hard.

A big cat sanctuary in Washington is temporarily closed and quarantined after bird flu killed 20 wild cats there, including cougars, bobcats and a tiger.

Twenty big cats, including a half-Bengal tiger and four cougars, died between late November and mid-December at a sanctuary in Washington State after becoming infected with bird flu, according to the facility’s director.