my duck eggs are on day 25. indian runners.my first duck hatch. I took them out of the bator to candle on the way to the hatcher. all eggs very full and moving. 1 egg was vibrating when I took it out of the bator. put it up to my ear and heard tapping. candled and saw a bill in the center of the air cell. that was about 6 hours ago. the duck has not pipped yet. does anyone have an idea how long it would normally be before I see a pip? getting worried.