duck eggs internal pips day 23

[jackslolita]

i have 6 duck eggs. 4 had internal pips on day 23. it is day 25 now and all have internal pips. all are moving but none are progressing farther than that.

does it usually take this long after an internal pip?

my chicken is sitting on the eggs. should i spray them? there due on tuesday this week (today is sat.)