Ascholten
Free Ranging
But they did not do this LAST SEASON, and the characteristics of the SEASON don't change. winter is winter the weather is the same generally etc. the characteristics of the food CAN change.You see the feed as the only thing in common.
I see the feed AND THE SEASON as things in common.
If the birds start laying again with new feed and longer days, it could be caused by either the feed or the daylength.
If the birds start laying on new feed, and then you switch back to the "problem" feed and they STOP laying again with even more daylight, that will make a much stronger case for it being the feed. (Obviously, checking that will take several months.)
Aaron