I have been raising coturnix for a few months now and have had a couple of successful hatches. The last two times I set eggs in the incubator I have had 0% being fertile. Around day 10 in the incubator I candled the eggs. There were no signs of development. The temperature stayed around 99.5 and the humidity arount 45-50%. Is it possible that my males are not fertile any more? I have my coturnix 1 male to 3 female ratio. The only other thing I thought might cause the change is the change in weather. It is cooling off a bit here in Texas, but it hasn't gotten below a low of 52 degrees and a high of around 75-80 degrees. I need help. Any suggestions? Thanks!