I keep most of my adults through winter. The chickens don't lay so well in winter but at least half the quail seem to lay through winter so they help supply my family's egg needs. Last thing I want to do is buy eggs for Christmas baking from someone else.I figure keeping a good annual rotation on all adults will help. Purge the older in the winter and hold over only select breeders for the next year. That's what I plan on doing, anyway.