I'm not out of chicks. I'm just Sold Out of some or most by this time of the year. It's kinda what the others already said, but I'll add a little.
I start accepting orders for chicks in June to be shipped the following year...March, April and May. Some of my orders do start coming in, in June and those are on the top of my list. Those that wait until after the 1st of the year to order are near the bottom. I only have room for so many birds and that means limited hatches of chicks. I hate to accept orders for specific varieties and not be able to fill those orders, so when I feel I've gotten enough orders for a variety I say I'm "Sold Out". Of course I should still hatch some more of those varieties and those chicks are included as part of Hatchery Choice & Surplus orders or sold locally as leftovers with my "rejects".
I try to fill the first orders first, but depending on what is ordered and what hatches they don't always get filled first. After I've filled all the orders for specific varieties that I can I start filling Hatchery Choice and Surplus orders if possible. These are great opportunities for some great deals.