Night hawks are flying over to south in loose flocks and starlings have stopped breeding and flocked up, as have the robins and black birds. Coopers hawks can no longer find song bird eats virtually everywhere they look and they can not keep pace with the migrating songbird flocks. They are going to take more risks going after bigger stuff and juvenile chickens not under watchfull eye of parents are going to be more appealling than before. I am locking up my brooder reared juveniles that would normally be free ranged starting at 4 weeks. Now that will be delayed until 8 weeks to limit window they are vulnerable to pesky Coopers hawks.