id keep training them to be honest, and regularly, if they dont have plenty of basketing experience, i feel you will feel the after effects next season. I've known fanciers not to race ybs, and following season there yearlings flew exceptional, however they vigerously trained, and would go training short at least 3 times a week, and one long one 100 miles.But i wouldnt stop them training untill the end of the race programme my opinion. Then id lock them up for a month, and fed a very light mixture nearly 100% barley, to give the moult a kick start, with garlic in the water to the following season. after the month put onto a good moulting mix