How long will a hen stay fertile from a mating? OK, a chicken hen will stay fertile from a mating with a Roo for up to 6 weeks. My question is how about the Coturnix? I don't think I've read anywhere about how long quail stay fertile. If I have, I have already forgotten. For Instance, I want to breed my 4 Goldens with the Jumbo Brown Roo then a Tibetan Roo. How long do I separate the hens from all Roos once I decide to change out their partner? I am thinking omewhere between 2-4 weeks. Course, first I have to get some Tibetans. Enjoying my little Nasquail daily race around the pen. How cool is that? No one ever mentioned they are little racers and very entertaining at that. I go over to check on them and they start racing around the food and water troughs that are in the middle of the pen. It really does remind me of a Nascar Race. They know they are getting their food topped up and/or fresh water, and get all excited. Ah, nothing better than cool water on a hot summer day.