Rex doe with new kits question

Hi, this is my first time on here so hopefully I am doing this 'right'. Anyway, I have started small with meat rabbits a several months ago and my doe just gave birth to 6 kits. I realize that does normally only feed their kits 1 to 2 times a day and usually it is at night, etc. I normally let my rabbits out of their cages into a larger very secure fenced area with a lot of trees, grass, etc. They stay out in this area for several hours a day. Now I would not let her out with the buck right now but should I keep her in her cage all the time since her kits are in there (in the nest box)? Or should I let her out a few hours a day in the big pen to get her usual exercise. Thank you so much.