WolfTrack,
The extra chick in your order was because you ordered a larger number. They sent an extra of something you already wanted, to hedge against a loss of a chick enroute. If they send you 25 and one dies, then they owe you 1. If they send 26 and 1 dies, then you are even. Since you ordered a large amount, 1 extra wont make a bid difference to you. But those of us ordering a small number, can only handle the number we order, so an extra, if they all survive, is a hugh problem for us.
A packing peanut (which MPY doesn't do) is normally a random male that they have too many of. They are put into small orders for extra warmth. The problem of what to do with them is then your problem.
-David