This is a HUGE difference. Starch peanuts are perfectly fine, but
Styrofoam will get ingested and can cause blockages.

The test is easy - put one of the peanuts in water. If it dissolves, it
is made from starch and all is good. If it simply floats, seal them up
and get them out of the house! Think Styrofoam coffee cup - with a half
live of a couple thousand years. You definitely do not want your
ferrets playing with and eating Styrofoam!

Larry Anderson
Scales and Tails Rescue

[Posted in FML 7606]