Sadawy,sorry can't answer in detail all your questions as my typing skills leave alot to be desired.Your pairing up plan seems ok and training can be done after you remove the second round of eggs.If the roundabout system suits you that is fine,you should have no problem racing for 10 weeks always remembering not to let the sexes see each other too much.Regarding feeding,a light mix early in the week will also help in maintaining form over 10 weeks.There are a few motivation tricks eg. two hens one cock etc. that may help and I'm sure the lads on Basics will have a few more idea's for you.atb.