Hi I put 2 eggs with a broody hen app 3 wks ago. 3 days ago the other hens (who up to this point had not bothered the nest) took one of the eggs and the chick and killed it. I took the other egg into the house and put it in an incubator. Since I don't know the age for sure how do I know if this egg is still viable? I candled it and it looked to be at least 18 days, I didn't see any movement while candling it. What should I do. I have not opened the incubator for 3 days and thought I saw the eggs move last night, but I might just be wanting it to move. I know I saw movement the first day for sure I just am not sure now. The other chick was fully formed, a little short of feathers on the rump, but looked to be close to hatching.