X3Jack930
Chirping
I noticed a mallard duck in my front yard garden over a period of almost a week and found her nest. About 2:30 AM on 04-06-2020, Mama Duck was taken by a fox- it was COLD & raining, so I scooped up the eggs, googled how to hatch without a “broody duck”, made a cardboard box bator (tin foiled sides, an old desk lamp- 60W bulb, egg carton padded bottom and a folded towel on top of padding) and researched how to hatch duck eggs. This is my first time EVER making a bator, finding eggs, trying to hatch them, etc., etc., etc.. It is now exactly day 14 (2 weeks) that I have kept my babies alive. They sit on the towel covered egg carton padding, narrow egg side pointed down. The temperature ranges from 98-102 but I check it every 1-3 hours. I do not have a device to detect humidity (I know, I know.. I should, but this was last minute and I don’t intend on doing it again, which is why I didn’t buy a real bator either) I turn them 180* 4-5 times a day, spray them with 100* water once a day (during this time I add water to bowl, add water to a sanitary pad I added for additional humidity and mist all 4 sides of my bator) this then cools my eggs which I consider similar to mama duck getting off the nest to eat, bath, etc., allowing them a brief cooling period. (Am I thinking correctly here?) I candle my babies every single night for movement- ALL 10 of them “dance” and move when the light hits the egg and sometimes I can’t help but do it during the day! So this morning my babies are all still going strong- but I cannot for the life of me figure out how old they are comparing to the duck candle egg chart (this chart is great for embryo size, but not air cell size). So looking at the candle egg chart I feel like they are 18-22 days old. Looking at airway cell sketches I feel they are 18-24 days old. I know hatch is 28 days. My concern is that humidity needs to be ramped up, turning needs to stop and “lockdown” needs to happen three days before hatch! Can anyone give me advice on how to figure out the exact age of my eggs? I already read up on assisted hatches, found a great thread, just incase of “shrink wrap”, pipping at wrong side of egg, pipping internally but not externally within 24 hours, etc., but I’m scared I made it this far that if I don’t stop turning or ramp my humidity the 3 days prior to hatch that I could lose my babies and all of my hard work! 
Any advice on figuring out their exact age or what I should do since I don’t know their exact age while approaching hatch would be amazing!!
Thank you in advance!!!

Any advice on figuring out their exact age or what I should do since I don’t know their exact age while approaching hatch would be amazing!!

Thank you in advance!!!
