1. My girls are 23 weeks old, not laying yet. I read conflicting advice on when to change them to layer feed. Should I do it now or wait for them to start laying? I've got to buy more feed in a few days and Im confused. 2. My lowest of the pecking order, will the others pick at her (or each other) more now that they are spending more time cooped up? I have 7, and the coop is 12 feet x 15 feet, 6 foot high. 3. I plan on getting a few more started pullets this spring. Is it ok to keep them in the same coop with chicken wire separating them until they are integrated? (After the newbies quarantine period) 4. Why do nest boxes have to be up off the floor?