I have an egg with an aircell that goes all the way down from top to bottom and a little up the other side. It almost encircles the entire egg vertically. I have been thinking of tossing it but when I candle it the veins still appeared red. Today is day 18. I went into a very dark room and candled it and saw no movement at first, then right when I was giving up on it I saw a little movement, I could not believe it. I will get photos tonight when hubby is here to hold it when I snap a photo. If this egg hatches I will be blown away.