I have not gotten any chicks from
TSC but I have talked to some of the people there about them. Each
Tractor Supply is going to be different. Each local manager has some flexibility to do whatever they want within certain restrictions.
They are not restricted to any one specifc hatchery but can order from different ones. They can order whatever breeds they want, whatever mix of sexed chicks they want, bantams or full-sized. They may or may not have a "pullets" bin. Some keep reordering chciks and have them available for a long season. If I don't get there when they come in, they will be gone from mine.
Some
TSC's will make a specific order for you. My
TSC orders from McMurray. They will place a special order for you, but they have the McMurray 25 chick minimum limit and the chicks are mailed directly to your house. There is absolutely no benefit to ordering through
TSC for me. But with some, you can order the specific breeds you want and avoid the minimum chick order.
I really recommend you talk to your local
Tractor Supply manager and see what they do. And make sure you talk to the person making the order. Some people at my local
TSC are pretty knowledgeable about what is going on with the chick program, but not all are.