I've read a lot of posts on how hard it is to get your chicks sometimes. How early should I put in my order if I want chicks in say, March? Do I put it in in January? Also, this is going to sound stupid, but I've never ordered chicks before. If I go through MPC it says +$10 to get sexed chicks. Is this PER chick, or per order of a certain breed? Thanks so much.