MATTAWAN, Mich. (AP) - The Humane Society of the United States is pushing for the release of three dozen dogs from a west Michigan laboratory, alleging that the animals are being fed fungicides. The animal rights organization on Tuesday released the findings of an undercover investigation it conducted last year at Charles River Laboratories in Mattawan. The humane society says the lab was hired to use 36 beagles in a yearlong pesticide test for a new product being developed by Corteva Agriscience, which is a division of DowDuPont. The society alleges that the dogs will be euthanized in July. Corteva says the animal testing is required by regulators in Brazil. Dow says the company is looking for alternatives that wouldn't involve testing on animals. The lab says it's committed to treating animals ethically.