This is my first flock. I have 11 hens and 1 Roo. This is their second winter. They are Buff Orpingtons. They are kept in a draft-free 8 X 12 Coop with a secure, covered, wind-protected, dry 10 X 16 run. Last year, we fed them Orscheln's brand layer crumbles. In the winter they slowed laying to 4-6 eggs per day from 7-9 they gave in the summer. Then our Orscheln's sold to Bomgaars in late summer. Of course, we still had some Orscheln's feed to go through as we switched over. This winter they have slowed from the 7-9 summer laying yield and have now slowed down to 1-2 per day. Is this the feed? The older birds? I mean they are not quite two years old yet. I have not been able to find any complaints on Bomgaars feed. Should I change? If so any recommendations? Thank you for your help.