We can never forget that they are still dogs. They have instincts that remain beyond their own understanding, so anytime you don't feel right in your gut about a kenneling situation, don't do it. I've had bitches that just wouldn't get along if they were within 5 feet of each other. Didn't dare ask them to share the same personal space. Oddly enough, I see this behavior more often with the subordinate Beta females. Two girls, both with their eye on assuming the throne should the Alpha female succumb.
When all dogs were wild, nature prepared the Beta female to step in should anything happen to the Alpha. They could even come into milk and finish raising a left-behind litter if need be. Although our domesticated versions have lost many of the physiological functions, they still exhibit behaviors of old days. Beta females can be bold - often fooling one into thinking they are the Alpha. They are assuming a lot of the functions of the Alpha as "practice". Most Alphas are glad to let them do the work, but when push comes to shove, they know who's who.
One way to tell if 2 bitches could possibly be "mortal" enemies is to recognize the body language and cut it off at the path. As you know, males will puff up, face each other most of the time, tails erect, hackles up, etc. Bitches will do what I call the "swapping ends" act. They will sidle up to each other facing opposite directions, tails at 12:00 and just dare one another to move. I keep bitches like this apart in kenneling situations. When they are loose in the yard, keep a handle on them and if either still fought in the field, it wouldn't stay in my pack. A move down the road to a different pack, or to the hunter that just keeps a single hunting dog may solve the problem.
If you feel it's more nuisance scrapping (young females just stretching their skin a bit) I'd follow Southern Beagle's advice of applying correction (of whatever method you're comfortable with) until they both get the message that YOU are the Alpha Supreme and you don't give them permission to fight.
Drawn out answer to a simple question - I'm guilty of that a lot. Welcome to the board!
