I have only had a hatch rate lower than 50% A few times out of many, many hatchings. One was because the eggs that were sent to me were filthy, another was hard to hatch and some were just not very good stock. Mostly though, I have had very good hatches and just from my LG's. I think it has a lot to do with the hatcher. We often think we are doing all the right things but you have to experiment to figure out what works.