I’m a beginner and getting 5 chicks this week and there are a variety of breed options. Buff Orpington, barred rock, black australorp, Easter Eggers, light Brahma and RIR. Do I have to stick to 3 of one breed and 2 of another, or can I mix it up more? I’m having a tough time deciding which breed I want to go with because many of them seem great!