Should I separate my pregnant doe bunny from the other doe?

I have two large hutches. One for the doe's and one for the buck's. My pregnant doe is about 6 months and I am pretty sure she is pregnant. How ever I just got an 8 week old doe and they are bunking together and seem to enjoy each others company. Now, I know I have to separate my pregnant doe from the bucks but do I also need to separate her from the 8 week old doe?