Hi, I'm a first time wannabe egg hatcher but my set-up isn't very good. I don't have a thermostat and so have to manually regulate the temperature. There have been some ups and downs but 10 of the 11 eggs I set 10 days ago are still alive and moving around in there. One wasn't though, so I took it out to have a look. Can anyone see any reason it might have died. It was a smallish egg from full size hens but I have a smaller one that's still going.