MATTAWAN, Mich. (AP) — A western Michigan laboratory has halted pesticide testing on beagles, shortly after the Humane Society of the United States raised concerns about the animals’ treatment.

Corteva Agriscience, a division of DowDuPont Inc., said Monday that Brazilian regulators had approved a waiver that’s allowed the company to end testing. The testing was contracted to Charles River Laboratories in Mattawan, which is about 10 miles west of Kalamazoo.

The Human Society last week released an undercover investigation into the lab. The group said one experiment involved 36 beagles that were being used in a yearlong pesticide test for a product being developed by Corteva.

Corteva says it’s working to help find homes for the animals involved in the study.

Humane Society President and CEO Kitty Block calls the decision “a huge win.”