it varies with all kinds of hens, I have some that will never leave the nest with no food and water, I had to forced them out so they can have water ! ( very hot here) I wouldnt bother her every day if youre hatching eggs. just once in a while, get her out so she can eat and drnk. dont be surprised if she runs back to her nest !How do you know how long a hen has been sitting on her eggs
And is there exact time they will come off their nest to get food and water and poo