Yup - agreed, we no longer have TSC here - Peavey Mart bought them out. But they have dealt with Hoovers in the past so still do. Meanwhile we have a perfectly wonderful hatchery here (Freys) not a 2 hr drive away - and they DELIVER the chicks themselves on the dates, to the local Feed Mills...
Your best bet is to call the Feed Mill and ask them where they got the chicks on 'such and such' date. They likely get them from a local hatchery if there is one close-by, or from one like Hoovers Hatchery.
If Hoovers I would say the blue's are their brand called Sapphire Gem or even a Prairie...