Can you put two unrelated female mini lop rabbits in same hutch?

My 11 yr old son has an approx 3 month old female mini lop and we are looking at getting another baby mini lop for our 9 yr old daughter. Can we put two unrelated females together in the same hutch or will they fight? The hutch isn't huge but they would get a LOT of "house time" when brought inside for a run around (which the first one gets now anyway).