We are new to having backyard chickens. We started off with 9 but sadly our flock contracted a virus and 5 chickens have died. Our remaining 4 seem strong and healthy. We have 2 Easter Eggers, 1 Speckled Sussex, and 1 Lavender Orpington. None of our chickens are laying eggs or crowing. They are all 6 months plus old. Should we be concerned because none are laying? We got them all as chicks so we aren’t 100% if they are Roos or hens, although we were told they were hens. Any advice would be greatly appreciated.