We all need to remember that for every hen hatched there is also a rooster hatched...that is how the percentages work out. 50% hens and 50% roosters. Eventhough you have had good luck with your small feed store chicks...they are also most likely coming from a hatchery perhaps even the same one that TS uses. Unless you get sex linked chicks its a crap shoot. By the way sex linked means that they are (please see this article below)
https://www.backyardchickens.com/t/261208/sex-linked-information

https://www.backyardchickens.com/t/261208/sex-linked-information
