Not only the balancing act of a young male it is also the female submitting correctly. If you up your protein that might help. I know that in one breed I have I have to use a higher protein to get good fertility.Getting very frustrated!! Not sure if it's my cockerel or pullet. I'm having fertility problems. Had to throw out 4 out of 6 eggs at 2 weeks in bator for non-fertile. Checked the ones after 7 days and looks like almost all of the 7 eggs are infertile. It's not the condition feed etc. Because all my breeding areas are the same. And the pair of reds are the only ones having this issue. All other breeds I never throw out eggs for this. It's going to take me 5 yrs to get any type of flock with these.