why are we worring . when the old bird season comes round the young birds that we are speaking about are going to encounter old bird racing with the same clashing . maybe we look to much into the birds we loss , they have to make a decission to come home on there own even if there is clashing. look at the birds that u still have from prevous years did they fly the full program as y/birds . i m not saying that every bird we lose are bad , i myself have had heavy losses since the start but the ones i have left seem to come home ok . clashing does nt help it just weeds them out. the strong from the weak