Oh my goodness, we have like exactly the same chickens! I have 3 WL, 3 RIR, 3 BR, an Americana, and a Bantam Cochin, along with some ISA Browns. Okay, so not EXACTLY the same, but similar.
It is possible for other breeds to go broody, it is just not as likely.
Good luck!
Hi!
I have heard that if you slack off on collecting eggs for a few days, the hens are more likely to go broody. What breeds do you have? Some that go broody often are Cochin, Silkie, and Buff Orpington (and probably other Orpingtons too). If you have breeds like the White Leghorn, you are less...