Two cats in different households in New York City were infected with bird flu, the city's health department announced.

One of the cats infected with the bird flu was an 8-month-old kitten on the Upper West Side that consumed raw chicken from Savage Cat, a company that makes raw pet food. A veterinarian said the kitten had to be euthanized.

Mutated H5N1 Bird Flu Found in Cats: Scientists have identified a genetic mutation in two infected cats that is linked to increased infectiousness and disease severity. Mutation Similar to One Found in Cows: The mutation, PB2 E627K, is similar to one found in San Bernardino dairy cows, though the cats were infected with a different strain.