right now im feeding store bought feed, free choice but ive decided im going to start mixing my own feed for my flock. i imigine it could be pretty expensive to get all those ingredients so i will probably restrict the amount of feed they eat instead of free choice. i remember reading some were you feed them only what they can clean up in 10 minutes. is this true? and what time of day should i feed them? mornings are busy so is it ok to give them feed in afternoon or evening?