Archive · 20 Aug 2025
California Issues Warnings Over Blue-Fleshed Wild Pigs
Some wild pigs in California are turning blue because they've been poisoned by a rodent killer called diphacinone.
This poison is meant to kill rodents, but the pigs are either eating the poison directly or eating the poisoned rodents.
The poison gets into their bodies and turns their muscles blue.
If people eat the meat from these pigs, it can make them very sick, causing internal bleeding.
Even cooking the meat doesn't remove the poison, so hunters are being told to avoid any pigs with blue flesh.
California has tried to limit the use of this poison, but it's still being used on some farms.
Wild pigs in California are exhibiting blue muscle tissue due to diphacinone poisoning.
Diphacinone, a common rodenticide, is seeping into the pigs' tissue.
Health officials are warning hunters that cooking the meat does not remove the toxin.
Eating contaminated meat can cause internal bleeding and other health issues.
California restricted diphacinone use in 2024 but has farm exemptions.
- Who
- Wild pigs and hunters are affected; officials, and farmers are involved.
- What
- Wild pigs in California are exhibiting blue muscle tissue due to diphacinone poisoning.
- When
- March 2024 when the first pig was found, with the news published around August 2025.
- Where
- Monterey County, California
- Why
- The blue flesh is caused by diphacinone, a rodenticide used to control rodent populations; pigs either ingested the bait or ate poisoned rodents.
Environmental Protection
Agricultural Interests
Use of Diphacinone
Environmental Protection
Conservationists are concerned about the impact on wildlife.
Agricultural Interests
Farmers might argue that restricting diphacinone limits their ability to control rodent populations effectively.
- Affected Animal
- Wild pigs
- Location
- Monterey County, California
- Cause of Blue Flesh
- Diphacinone poisoning
- Rodenticide
- Diphacinone
- Health Risk
- Internal bleeding and potential collapse
- Action Taken
- Restriction of diphacinone use, but with farm exemptions