This is my first hatching attempt. I'm using eggs shipped through eBay. The initial set came from three sellers - the eggs of only one seller really developed. Beautiful little hearts beating, then their eyes showing, then movement ... There were 10 little birds living, and then one by one, in the last five days, four have died. I opened one egg - ai yi yi - and it was hard to look at but then fascinating to see how the chick had developed. It looked the same as week-old embryos pictured online, and I didn't see any defects. Now tonight was the fourth death ... I don't want to look. The other six are still moving and apparently thriving ... am I doing something wrong? Wouldn't I see a larger loss at once if there was a temperature or humidity problem? Does this just happen all the time? Thanks.