"Suggest it to her, then," he says with a shrug. "Just have to keep the spirits from eating it. Or maybe Gregor himself might want to do it, but she could speak to him about it. Maybe try meat as well as something else. Bread. Something already cooked."

Or the more science-inclined probably will come up with their own ideas as well as smart ways to go about testing all this stuff. There are probably signs of decay other than just smelling bad or turning green that they could track, but he's no expert. He just supports anyone who wants to do something that will help them learn more about their situation among the dead.