We are super excited! One of our hens just started laying. She's only 4 months (and 1 day). Are there breeds that tend to lay early? Just trying to figure out which of our 5 hens it may be. Supposedly we have a Java, a Jersey Giant, a Plymouth Rock and a Blue Plymouth Rock... and Gizmo, our mystery chicken. We bought them at Tractor Supply in March so the stated breeds could be wrong and Gizmo was always a mystery.