The big breeding hatcheries where you can order chicks some of which supply feed stores.
I have used Hoover Hatchery in IA for some chicks since they are NPIP and certified mycoplasma free.
Anyway most of what these hatcheries sell as RIR have been bred for egg production. They have bred...
I love Barred (Plymouth) Rocks too. Good layers, hardy and friendly. Here is my Georgie (she was curious). They lay better than some EE, and though
I love my Heritage RIR too I don't have kids, most hatchery ones are not as friendly.