With concern over the bird flu continuing to mount across the country, one Inland Empire man says that his beloved pets fell victim to the virus after drinking contaminated raw milk.

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.

Los Angeles County health officials warned pet owners on Tuesday about feeding pets raw food after a house cat tested positive for bird flu.