I gave 5 buff duck eggs to my silkie hen to hatch. Shes done a great job so far. The first baby hatched on Sunday, the 2nd on Monday. Now its Tuesday and the other 3 haven't hatched yet. I candled the eggs quickly, and I can see them moving so I know they aren't dead, and 2 eggs have had cracks on them since Monday too. How long can it take for a brood to hatch? Should I help along the 2 that have pipped so far? Is it normal for them to take 3 or 4 days to hatch? Thanks!