The 19 weirdest risks big companies warn their investors about

Scrawny pigs. Avian bird flu. And batteries that set cars on fire.

These are just a few of the crazy things that big public companies annually warn investors could harm their operations or sales.

And there are plenty more.

Business Insider dug through a number of public companies' SEC filings and put together a list of the most unusual things that companies flagged.

Check them out below.

Disclosure: Jeff Bezos is an investor in Business Insider through hispersonal investment company Bezos Expeditions.