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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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Four Star Pork Industry Conf - Back to Basics: Fundamentals drive vaccine performance

Video: Four Star Pork Industry Conf - Back to Basics: Fundamentals drive vaccine performance

At a time when disease pressure continues to challenge pork production systems across the United States, vaccination remains one of the most valuable and heavily debated tools available to veterinarians and producers.

Speaking at the 2025 Four Star Pork Industry Conference in Muncie, Indiana, Dr. Daniel Gascho, veterinarian at Four Star Veterinary Service, encouraged the industry to return to fundamentals in how vaccines are selected, handled and administered across sow farms, gilt development units and grow-finish operations.

Gascho acknowledged at the outset that vaccination can quickly become a technical and sometimes tedious topic. But he said that real-world execution, not complex immunology, is where most vaccine failures occur.