New World screwworm is back on Texans’ radar after animal health officials confirmed a case in South Texas in early June 2026. While the largest risk for this parasite is generally in cattle and other livestock, New World Screwworm can also affect dogs, cats, people, and other warm-blooded animals. For pet families it’s important to: check wounds promptly, keep your pet on flea and tick prevention medication, know the warning signs, and contact a veterinarian quickly if something looks wrong.