You need to contact the hatchery you're ordering from, Nature's Hatchery, and ask them. I know at McMurray's you can request NO packing peanuts if that's what you want. They're usually added when the hatchery has an excess of something and like the name implies, they're included to be shock absorbers for the chicks you order. They usually are cockerel chicks, because that's what the hatcheries always have an excess of. But they may not be of the breeds you've ordered, they may be other breeds that they have an abundance of. The hatchery may agree to mark the peanuts, or they may not. You need to contact them to find out.
If you get extras that you don't want you can usually give away/sell them for a few dollars. Someone should be happy to take them and grow them out for the table.
