So, we have 1 Roo and 3, 1 year-old hens. Problem is, only one of the hens is laying (Aracauna - easy to tell with the blue eggs.) My 2 other hens (Rhode Island and Delaware) seem healthy, aren't broody - are free ranging all day, not moulting, given a supplemental light at night, and have free choice water and layer pellets. I've given the whole flock 2 days of anti-biotics in their water to ward off any issues, but still no eggs. What can I be missing? Appreciate your time & responses!