Here is the low down. I have 1 buff orpington and 1 Barred Rock that are 1.5 years old. The Barred has not laid for 1.5 weeks and the Buff randomly lays. I also have 1 Golden Sexlink, 1 Rhode Island Red, and 1 Americana that are 6 months old. Only the Red has started laying, but I have not seen anything for a couple days now. I see no obvious reason for stress like mites or molting. Any advice? Did I mix too many breeds? Could it be the summer heat? It has been hot and humid for WA State.