I don't know. I've read studies showing the capacity of the egg white in an egg to bind biotin outstrips the biotin content in the yolk. I've not seen anything showing animals being given actual biotin deficiencies while being fed whole eggs, though. An egg a day is one thing, if somebody wants to make raw eggs a major food source, that might be another thing.

I have a weird intolerance to broth. Take any meat, fish, fowl, and boil it with salt for a few hours. If I drink the broth, within ten minutes I'm probably running to the bathroom. Gives me the runs. Vinegar, or stewing the meat in some tomato, keeps that from happening. But raw/undercooked meat doesn't give me this problem. So my gut seems happier with raw meat than with at least one cooking method, going in.