I have a call duck egg that my duck laid, I put it into my incubator on March 26, and today, April 29 it still has not hatched yet. I see it wiggling around in the incubator, and I do know that my temps have been a little low, around 99 for the whole incubation period. My question is do I candle the egg to see if it's internally pipped? Or should I do as I have been and leave it alone? I've been able to gently roll the egg around in the incubator and I don't see any cracks on the outside of the egg. Any help will be greatly appreciated!