Gorgeous aviary! I love it!
Broody Japanese Quail - Aviary-induced rarities - Page 2
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You should try and I would love to hear if it worked. I suspect it would not though, especially if there were more than one pair. Guidelines for the number of Japanese quails/square feet are grossly underestimated. If they are stressed for room, I highly doubt they would go broody. But I have personally not tried it so who knows