My two girls play like this and have done since the day we brought them home. They are 9 months now and had started to calm down just a little bit, with shorter bouts of play fighting, however since our new pup Archie arrived on Saturday they have started again with avengance, only now it is 3 way rolling around and play fighting,

only stopping when Archie has had enough and drops on the spot to sleep.

I never tried to stop them, just let them get on with it, they were having such fun. Hopefully in a couple of months or so Sophie and Holly will start to setle down a bit, but that is how dogs play, so I don't think they will ever stop altogether and it is certainly better than them not getting on together.

I do understand how your MIL must feel though as when my mum is here she has to go out of the room after a bit as she can't stand the noise. I think I have jsut become immune to it.
