imo they can only learn so much once they have mastered the last 20 to 30 miles and been there plenty times id leave them to next year if latebreds thats different anything from 6 to 20 short tosses will stand them in good stead for next year as for the moult as long as your are not going to far it will do them no harm as long as its not to cold choose the best days with the wind not to strong good luck with them