One would think that Driola was joking, but no, she was dead serious. The team was hungry enough to try their luck on a dead demon/animal, and the explorative side of such hunger was just a bonus.
Bardeelus had thought about this over the past few minutes, he even sought the remains of that prior dead deer, to conduct an experiment similar to this one. He didn't think this overall idea was crazy, they needed food.
However, there was no refusing that demonic meat, even if half mammalian, could be dangerous. A consumer could get poisoned, and they couldn't simply rule out that horrid possibility. A tummy ache from goofy-looking meat, may take a big toll on a person, more than a ghostly possession ever could.