[urban_strike]

> They can't fight or flight so their defense is toxins.

The very next sentence.

Animals can run away or fight, so they don't have the need to develop other deterrents. I guess aside from a very few exceptions like Amazonian frogs, which would also not be recommended to eat without very special processing. Probably best to keep off the menu altogether, just like most seeds, stems, and leaves for the reasons described in the parent comment.