I would be too lazy for this much effort, so I guess it's a good thing I just avoid dead animals altogether. (Though admittedly I only avoid the need to consult a pocket guide for that because I don't buy much processed food, where it can be hard to tell with the cryptic food additives whether they are made from animals as base or possibly made from animal. And food is not even as bad as hygiene products for containing surprise animal parts labeled with unrecognizable chemical names.)