I have a 5 week old Buff, who has discovered his brothers Mazuri Waterfowl food and loves it! He eats his chick starter at night, or any time he is in his play pen ( I have house ducks) but once he is out for the day, he bee lines for the adult food. At what point can he just have adult food? Also, when can I stop with the 'round the clock feeding? Thanks!