Wild Pigs Turn Neon Blue From Rat Poison

Game hunters in California have encountered a bizarre and alarming phenomenon: wild pigs with neon blue flesh. This striking coloration has been identified as a result of poisoning from rodenticides containing the chemical diphacinone. The substance, often dyed blue for identification, is a first-generation anticoagulant that causes severe internal bleeding.

Authorities have issued warnings across Monterey County, emphasizing that game animals like pigs, deer, and bears may carry this contamination. The chemical remains active in tissues even after cooking, posing a serious health risk to predators, including humans, who consume affected animals. Non-target wildlife globally also suffers from such poisons.

While diphacinone's use is now highly restricted in California, its past prevalence and the pigs' omnivorous diet mean exposure remains a concern. Integrated pest management strategies, which emphasize safer alternatives and barriers, are being promoted to mitigate these risks and protect both wildlife and human health.