I feed a little differently than most do, but... at around that age my chicks are in wire floored grow out pens and they get fed fermented feed, AM and PM (they get a bigger portion in the AM than they do in the PM so there's less wasted food, and also so rodents are not attracted to my pens). They get some scrambled eggs, cherry tomatoes, cucumbers, zucchini, fresh greens etc the afternoon for treats.Quick question; how do you guys feed? A specific time of day or full feed? If like to control their food so that thru associate it with me and will become more tame but when they're growing this fast I hate to shortchange them. There are lots of weed seeds in my pen, I think they get enough during the day that I'd like to feed just at night so as to gets them to come to me and eventually be able to hand feed them.
Edit: by night I mean evening when I get home from work.
Not sure when you get home from work in the PMs but the daylight hours are shortening already and getting shorter every day, so if you are only feeding them in the PM eventually they may not get much to eat (unless your coop/pen has lighting). I just have a few solar lights around my grow out pens, so my chicks are typically snuggled together up on their perches instead of eating once its dark.
How about giving them special treats every PM instead of feeding them their main meal at that time? My Peas all learn the treat routine real fast... so I'm betting yours will be anxiously waiting for you once they figure out you are bringing them special yummies the same time every evening.
Just a suggestion, maybe others have some better ideas.