Instead of doing the several day long ferment, try the overnight ferment. I put feed in a plastic container and cover it with water, it grows in size overnight and mine love it. With 5, I would do about a cup of food to start out and if they finish it quickly, I would increase the amount until they finish the feed in about 15-20 minutes. I also free feed dry as well to make sure that all of my birds get plenty to eat as they free range all day.
That was going to be my next question...how much to feed them. I have one that is 18 weeks and just laid her first egg yesterday, and 4 that are 12 weeks.
Another question...what is "mother"? I saw that somewhere else too.