Picking up chicks...at the post office?

Our chicks arrived at the post office today (resulting in a 5:30 a.m. telephone call...oy!). They're now busily chirping away in their basement nursery. We ordered the chicks from McMurray Hatchery, as we've been pleased with their selection and the health of the chicks on arrival. We ordered a 25 chick "rarest of the rare" assortment, 10 Aruacana pullets and 2 Red-laced Cornish chicks for a total of 37. We were also promised one free rare chick. We got all these plus 14 White Rock chicks to fill out the shipping box - grand total = 52 chicks (plus one white chick died in transit.)