Yep Fowlman and open doors cautiously, you dont want to know how often my daughter ends up chasing a fly-away. Most times they do actually fly a couple of fields away but then return and hang about outside the pen waiting to be let in or wander into an open hen pen. Tend to try and escape when we are doing occasional deep cleans of the pen and having to move them around.
I feed layers mash and occasionally some millet. You can buy Layers Quail Pellets - Marriages and these are good (higher in protein, I think). I would have thought Layers Pellets were a bit big for them
. They like to eat grass and some greens eg. spinach.
They really love a dust bath and conifer branches to hide in. This also helps to prevent fighting.
The males are very aggressive - watch out for fighting. Much worse than cockerels.
Have fun.