Yeah there's going to be fighting for the first two weeks or so. If anything gets really bad you can take the bully and put her in a plastic breeder box so they can still see each other, just not inflict any damage. I've had luck with only leaving them in 2 days but sometimes they need to be left in for about 2 weeks until everyone settles down and gets used to seeing each other.
Just because they were from the same breeder doesn't mean they were all necessarily in contact with each other all the time :)
I love that boy though! He's beautiful!