Hello I have 7 hens now.... Two of them I just got 3 days ago. I've only gotten one egg in the past 2 days. I was told that 2 of my hens are most likely laying by now and the 2 new ones was laying when I picked them up. The 5 of mine are about the same age but different breeds. I have a NH, BUFF, EE, and 2 black Australorp. I just got two silkies three days ago. What could cause them to not lay and why is it taking a long time for my others to lay?