Two ducks hatch early

Hello,
I have a broody chicken sitting on 8 duck eggs I have been candling them whenever she gets off, last time I checked was on the 25th day which also was the last time she got off. On the 25 day 1 east indie had its beak through the egg and was hatching the next day I had two ducklings which was quick in my experience.... Anyway its the 27th day now and three more have pipped I just wanted to know if I would face any problems with them being three or four days older than the others :/ ? For example will she get bored and wonder off with the two of them?