I bred two sisters last year, and kept them together, and Im glad I did, one went into labour a couple of days before the other, and I was in the court, she came out of the sleeping box, and went to the corner to have a crap, but it was infact giving birth, it was the sister that licked the sac off, and carried the kitt, back to the box, they had a total of 15 between the 2 of them, and spent most of the time, transferring all the babies from one to another sleeping box, had they not been together, I reckon I would have lost a few,
the only downside was I couldent tell who's was who's