Another egg died on me, am I doing something wrong?

[Bean15]

yesterday I was candling my eggs, and all 4 were moving and had normal air sacks. I originally started out with 8 eggs, 2 were infertile and 2 died, one on day 4 and the other today, on day 12. The egg that is dead today was the most active one out of the whole batch as of yesterday. today I candled it, didn't see much movement, but didn't think much of it. I checked up on it a few hours ago, and I see absolutely no signs of life. This is a white shelled egg, and it's super easy to see into. I sat there completely still for about 2 minutes, looking for movement and there was nothing. I tilted the egg back and fourth just to see the embryo bump the sides of the egg lazilly. I see a faint blood ring. I have my humidity at 50-55%, my temperature at a steady 99.5, and this chick was fine earlier. Did I do something wrong or did it die on it's own? I want to make sure I get some chicks from this hatch.

 

[rjhsh]

Here are some possibilities, no need to candle daily, day 7 and 14 should be plenty. Handling them to much makes it easy to contaminate the egg with bacteria off your hand. Which brings me to number 2 would have been a bacteria that caused the progress to stop, i disinfect on candling days with TEKTROL. Last would be if the cock or hen is too old the embryos are sometimes to weak to make it through the incubation period. Sorry for your loss, hope you have better luck next time.

 

[nchls school]

The best you can do is check all the meters to be sure they are correct. THEN STOP BLAMING YOURSELF. It happens. Recently I had 7 Yokohama eggs reach hatch day. One hatched and six died trying to hatch. Even trying an assisted hatch proved pointless. The chicks were just too weak. These eggs were under a proven broody so conditions were ideal. There are reasons other than what we did or didn't do for DIS. Poor parent stock, diet, genetic weakness, even the weather may have something to do with it. I do know, with my serama, that if the weather takes a turn for the worse, near or on, hatch day I always have chicks die in the shell.