I asked a sales fellow at TSC what hatchery the chicks were from. He told me somewhere in New Mexico. He had a brochure of the chicks that TSC either have or can order.
Here is a great site for chick identification.
http://www.feathersite.com/Poultry/BRKBabyChicks.html
Here is a great site for chick identification.
http://www.feathersite.com/Poultry/BRKBabyChicks.html