I never worry about constitution for my league horses as once they are exported and uploaded, they are ready to run eack week.

I'm like u in that if a colt doesn't get full bar I get shot but keep the interesting mares, my best SO5 horse Greenbank Park was by a unraced horse. But every now and again a interesting colt will come along and i'll keep him and they can improve u stock. It comes down to time at the end of the day, I've finished my breeding for my Chasers and got a little bit left for my hurdlers but I've not breed any flat horses yet this year. Hopefully i'll have a week to breed some flat horses.

I just stick them all in a mixer let it turn about a bit and see what comes out the other side. Far easier to breed my flat hurdling chasers at the same time, but trailing takes a while.