Quail never cease to amaze me! My neighbor asked me to give her some of my young, Japanese coturnix quail, as the last batch I gave her turned out to have four females and one male, great for eggs, not so great for meat... So she's hoping to build her breeding flock, and I'm happy to help her do it.
After giving her the requested amount of 2 week old quail, I only have four left from that hatch, and soon thereafter my hatch of 23 occurred.
Here's the amazing part. I put the four 2-week olds in with my 23 day-olds and observed closely for signs of bullying, there was none. That night, I discovered two of the four 2-week olds doing their best to stuff babies under them to keep them comforted... couldn't have been a need for heat, as the brooder does have a heat source. The broody instinct may be eliminated from their genetics, but the desire to comfort the young is apparently alive and well! I found this totally heartwarming, and felt the need to share the experience