Females with puppy's will be more aggressive one of my Rottweiler's bit my neighbor lady in the face when I was stupid enough to let her and my girlfriend convinced me to visit the week old pups she wasn't hurt badly I was right there and were away from the pups a few feet, that dog was always great with people never bit before or after. Her mother bit a guy who reached to touch her pups while she was feeding them despite my telling him to stay back she would bite and had . Limit there exposure while the pups are around to just close personal contact with you and no pups, do the settle exercise with all your dogs I'll elaborate you go to your dog while they are laying down with some treats if you like or not pet them while saying settle or any command you wish they will learn by conditioning and roll them on there side with as little force as needed keep it calm even if they freak out put one hand on there neck/shoulder (if they try to bite I put my finger in there mouth from the back of the jaw where there are no teeth, biting is not allowed) the other one on it's hip from behind there back sit on them If you have too but they can't get up until they relax and lay there head on the ground voluntarily with minimal pressure and soon none keep it as light and friendly as possible keep it short to begin with and later do it longer, but win at all cost do this every day cut there nails brush them you are the boss. So next time if they think they can fight around you grab them both by scruff and slam them to the ground saying your command word use your knees to pull them apart if you have to and keep them on the ground until they give up if you do it every day they will known they can't win so it may not even happen to begin with good luck. Ps. females with pups can be unpredictable.