I've only been giving my Quail FF for about 2 months now and they are always full after about 5 minutes, I feed once in the morning and once in the evening and they are doing fine. I've also been sprouting Barley grass and bird seed (they love it). Mine are in cages though and don't have access to the ground, I use too but had some issues with flight predators...
If your FF is done correctly I don't see how you've had an issue.
First batch sits for a week, top it off with equal parts of new feed and water when it gets down to a serving or two. Keep in temperatures between 60 and 70, too little of temp and it wont ferment, to high and it goes bad... Depending on how many quail you have, you just need to figure out what they can eat in 30 mins.
Like I've said my birds do fine and don't bug me for food, unless I call them when I'm bringing it to the cage. Then they mob my plate and hand trying to get first dibs on the sprouts...