Beagle Breeders

USDA Class A licensed facilities that purpose-breed beagles for sale to research laboratories. These are the origin point of virtually every research beagle in America. The market is consolidating rapidly — from three major breeders to one.

3 → 1

major US breeders

After July 2026

~23,000

dogs at Marshall

Last major breeder

$35M

largest AWA fine

Envigo, 2022

311

Ridglan violations

DATCP, same period USDA found 0

Key Finding

In 2020, three major facilities supplied the US research beagle market. By July 2026, only Marshall BioResources will remain. Envigo was shut down by federal enforcement. Ridglan is surrendering its license. The supply chain has never been more concentrated — or more vulnerable.

Marshall BioResources

Active — Near Monopoly

The world's largest purpose-bred beagle supplier. Global operations in 7 countries. 20+ USDA violations since 2007. With Envigo closed and Ridglan closing, approaching monopoly status in the US market.

North Rose, NY~23,000 dogs

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Ridglan Farms

Closing July 2026

311 state violations. Devocalization without anesthesia. Same USDA inspector found 0 violations in 25 of 28 inspections. License surrender in settlement with special prosecutor.

Blue Mounds, WI~3,200 dogs

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Envigo (Inotiv)

Closed 2022

$35M fine — largest AWA penalty in history. 4,000 beagles rescued. DOJ criminal prosecution. Guilty plea to AWA conspiracy and Clean Water Act felony. The precedent case.

Cumberland, VA~5,000 (peak) dogs

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Liberty Research

Active

Smaller Class A breeder in New York state. Less publicly documented than Marshall, Ridglan, or Envigo. Linked to Marshall through geographic proximity and shared supply chain.

Waverly, NYUnknown dogs

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