Another thought is that you might give them their own piece of carpet to digup/chew on. I have found that carpet outlets/Lowe's/Home Depot, etc., sell their carpet samples, or they have remanents at a reasonable cost. Daisy likes to sleep underneath my bed at the head so I give him (yes, HIM, the vet got confused then it was too late to change his name)a length of remanent the width of the bed (I have hardwood floors) and 2-3 ft wide.
Then Daisy has not only comething to sleep on but can get in a corner and pretend to dig to China without harming the floor underneath. If you have carpet that you don't want your friends to dig up/chew, try getting a remanent and heavy duty staple it to a piece of plywood (so it's heavy and will not move around easily) and put it directly over the carpet where the buns want to chew/dig. That way, you save your "real" carpet and when company comes you can whip the remanent out of sight. Works great.
Yes, do getyour buns neutered. Females are especially prone to reproductive cancers.
The male will calm down and if done at an early enough age, he (hopefully) won't want to mark his terriroty (your home) and the female as HIS!
Best wishes with your new best friends!