Published May 13, 2026 by . Last Updated May 20, 2026. 3 min read PETA has uncovered yet another University of Massachusetts Chan Medical School (UMass Chan) experimenter whose career of animal torment burrows beyond the bottom of the university’s ethically barren barrel. Meet Heather Gray-Edwards: an experimenter who breeds sheep, calves, and more to develop neurodegenerative diseases. The animals suffer seizures and swollen brains, among other distressing symptoms, sometimes without pain relief. They have needles jammed into their spines and brains before they die or are killed—supposedly to test gene therapies for human diseases. Sheep are subjected to invasive and cruel experimentation at UMass Chan, an institution with a documented record of animal welfare violations. Gray-Edwards is the latest experimenter PETA has found lurking inside UMass Chan’s den of depravity , where others starve dogs, give pigs heart attacks, and botch surgeries in laboratories rife with animal welfare violations.…