We had about 45-50 duck eggs so far this year. We only got 5 ducklings, which seems pretty weird considering all the duck eggs we got. They were from our ducks so it wasn't from the eggs being shipped or anything. We waited 14 days after the eggs were supposed to hatch but then when we looked at them closely, there were dark shadowy places around the eggs.... that never happened with our chicken eggs. We have the temperature right at 99.5degrees-100degrees at all times. The humidity is always at 65%-75%... Is that the right amount? The ducks we have are two 1year old females, and an 8 month old. Our Drake is 8 months old as well. Is that too young? Thanks!