This may be a bit mercenary, but wouldn't Darwinism support an argument for
just not worrying about whole peanuts in the knowledge that nature would
quickly select in favour of birds which don't stick them whole down their
chicks throats?

I find that the peanuts go bad very quickly in feeders which don't dispense
whole nuts so I use them for seeds instead. Surely supplying chicks with
small but contaminated nut pieces is more likely to kill them than the
occasional whole but clean nut?

Martin