My hens are about 5 months and 1 week old. No eggs yet. They both have pretty red combs/waddles, but no sign of laying. They don't free range (we're urban) but have a pretty sizable run. They eat purina flock raiser, and one hen is a brown leghorn and the other is a barred rock. Am I doing something wrong? We're in Jacksonville, FL - so it has not been cold here. Any ideas?