What to do when ducklings hatch, advice please?

Hello, one of my little ducks has been sitting on her clutch of eggs for the last three and a half weeks so they will be due to hatch in the next few days.  She made her nest in one of my hedges in the garden,(safe and secure from predators) comes of her nest twice a day to eat, drink and have a swim.  This will be the first time I've had ducks hatching naturally, so my questions are:  Is she likely to bring them back into the garden, and if so, will it be straight away, or will she keep them in the nest for a few days? And what should I do when she does?  I have several other ducks, including 'Dad', dogs, cats and chucks, all of which live happily together but have never seen day old ducklings before!  I have a spare duck house and can make a separate run for her as they all normally free range, but she will be happy on her own with her babies or will I need to put Dad in with her? Any advice would be much appreciated 

sorry never hatched ducks so can't help - lots have on here so hopefully somebody will be along shortly.

It has been mentioned on here if you feed chick crumbs to ducklings they must not contain ACS. Ithink the Smallholders range and Allen and Page do them and any that are organic.

I've always fed mine chick crumbs from the big local pet shop just come in a plain seethrough bag and never had any trouble have raised two lots 

Well their all fit and healthy so must be doing something right im not to pc  all the time