This is the second time I've incubated chicken eggs , an one of our eggs has 2 blood rings !! But there is still movement inside the egg , today is the 8th day of incubation! An we're not sure what to do ! We don't wanna throw it out IF there is a chance for it to survive!
Hi If you still see the embryo moving I would leave the egg in the incubator and recheck at your next candling. All too often eggs are thrown away only to reveal a living viable embryo so erring on the side of caution just to be sure will do no harm. I've had quite a few where I've thought they had quit or been infertile to find out they were actually viable at the next candle. Good luck with your eggs and I hope you have a great hatch