This is the second time I've given my hen eggs. Both times, there have been developed chicks that didn't hatch. She is laying on 9 eggs and none have hatchd. All the eggs I very gently candled after hatch time had chicks. Is my hen doing something wrong? Can I gently move them to my incubator? Today it's 72 degrees with 58% humidity, which is pretty standard of the weather lately.