Bird flu wasn’t on Tim Hanson’s mind when he fed his cats specialty pet food containing raw chicken.

“You go to the pet shop and it was the premium raw food,” he said. “It was finely ground to a consistency that I thought was beneficial to my cats.”

But in early February, one of his cats, Kira, developed a fever and stopped eating. A test ordered by a veterinarian came back positive for bird flu. Within days, Kira’s condition had deteriorated — she became lethargic and had…