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Maryland Bans Arsenic In Chicken Feed

Maryland became the first state to ban the use of additives containing arsenic in chicken feed Tuesday. The measure is among several new statewide laws that took effect Jan. 1.

State lawmakers passed a bill banning the chemical last year. It's used to help poultry and other fowl grow and fight parasites.

Pfizer Inc., which distributes the product, stopped selling the additive in July 2012 after a U.S. Food and Drug Administration study found higher levels of inorganic arsenic in chickens treated with the chemical.

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Measuring Emissions from Animal Agriculture Using Genetics!

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Dr. Troy Rowan sits down with CLEAR Conversations host, Tracy Sellers. Dr. Rowan was a featured speaker at the 2025 State of the Science Summit at UC Davis. The event will return next year on June 16-18, 2026, continuing its focus on advancing livestock methane research and collaborative solutions.

Rowan, now an assistant professor at the University of Tennessee Institute of Agriculture, grew up surrounded by cattle on his family’s Charolais operation in Iowa. His family has been farming and ranching there for more than a century — long enough for the rhythms of agriculture to get in his blood.