our muscovy hen had 14 eggs in which 4 hatched. about a week after they hatched she started laying eggs again. 4 are about 5 days old and 1 is 2 days old. is it too soon after her first hatch for these to be fertile? when do you start seeing veins when you candle, a week after they're laid or a week after they're in an incubator? i want to get them in a bator soon if there's a chance they're fertile because she's not laying on them and brooding. any ideas?