My runner ducks had been laying LOTS of eggs, but now seem to have totally stopped. They are just over one year old. I thought it might have been because I was feeding grower feed (in addition to the layer feed) for my cornish crosses and maybe the ducks were getting more of the grower and less of the layer, but the broilers are all gone now and I have just layer feed out now. If the feed was the problem, how long might it take them to get back on track? If it's something besides the feed, what could it be? Any thoughts would be welcome.