A good doo is a good doo whether it is raced as a yb or not. If you don't race them as yb you will lose a few as yearlings but probably the ones you would have lost anyway as ybs. You could pick out half a dozen to race and send whats left every week. That way you will have the "fun" of racing and still have a wee team for next year. For me the season is short enough without missing yb races jmo tho. Good luck whatever you do