I have a runner duck egg that was under a broody. I had two under her developing nicely. Wednesday was day 28. On Thursday one started to hatch but was attacked by another chicken that snuck into the area I had my broody and was killed half way out of the egg. I candled this egg and there is movement, it is clearly still alive, but is now on day 31. I brought it inside and put it in my incubator and cranked up the humidity. I do have chicks that just hached on Thrudsday, so if this egg hatches it will not be alone. But I have never hatched a duck egg before. This was my first attempt. Any advice? I have only been able to get the humidity to 80% temp 99*. I candled and made sure the air sack was up. Is there anything else I should do, other than wait and see?
