I purchased my girls , RIR, EE, and Sex Linked, on October 21. I was told they hatched out on October 17. They seem happy and healthy. Going by the numbers they should be old enough to start laying in March. Yes? I am planning on adding the nest box in 2 weeks or should I wait longer? I currently feed them pellets in the coop, scratch and grit in the run and they have all manner of weeds and grass everyday outside the run. I keep water in the coop and run. Is there anything else I should be doing to get them ready to lay?