My chickens do not get any dry feed at all. I started them on ff when they were just 3 weeks old once I read about it. I only have a small flock of four girls, almost 20 weeks, not yet laying. I have a coop where it is about 85% run and 15% upper deck roost/nest box area with a pop door. When they put themselves to bed after sundown, I close the pop door. It starts to get light here around 7:15 with sunrise at 7:30. I don't go out to feed until usually 8 or sometimes as late as 8:45. They are locked in the roost until then. I sneak a peak at them before I open the door and they are just standing around doing nothing. Before I expanded their run they would immediately head for the feed trough and devour the ff. Now that they are a little more mature they cruise into the bigger run area and stretch their wings, talk to me, see what kitchen scraps I may have brought them, then they finally hit the ff.
I don't feel bad that they have nothing to eat when they first wake up. They have water in the roost area and they can get by with that until they are served breakfast. They do get to free range every evening for at least an hour and I give them a small snack of ff at that time as well so they are not going to bed with an empty crop. On a very rare occasion (and more so once it starts to warm up this summer) I leave the pop door open. They come down whenever they get up I suppose and still just hang out and do their thing until I come out to feed.
As they days get longer I'm not sure if I will try to feed earlier so they don't have so long to wait for breakfast. Of course I don't want them locked in the roost for an extended length of time every morning. This is my first experience with chickens as an adult so I will have to play it by ear as I go along.