After bird flu was detected in a stray cat in Half Moon Bay this week, health officials in San Mateo County are urging pet owners to contact a veterinarian if their pet shows any symptoms of the virus.

The cat had been taken in by a family, and when it seemed sick they took it to the Peninsula Humane Society. Veterinarians examined it and lab results on Tuesday confirmed the cat had H5N1, or avian influenza, according to San Mateo County health officials.