black and brown pigs in a pasture pen on a farm

Wild Pigs Turned ‘Neon Blue’ in California, Triggering Warnings

November 30, 2025 | Source: Science Alert | by Tessa Koumoundouros

Game hunters have found startlingly ‘neon blue’ flesh inside of wild pigs in California, triggering advisory statements on potential contamination.

“I’m not talking about a little blue,” Dan Burton, owner of a wildlife control company, told Salvador Hernandez at The Los Angeles Times.

“I’m talking about neon blue, blueberry blue.”

An investigation by local authorities found the dramatic color change was caused by rodenticide poisoning, prompting them to issue a warning throughout the Monterey County area.

Rat poisons containing the chemical compound diphacinone are often sold dyed blue for identification. The compound’s use has been highly restricted in California since 2024.