
Hi Archer,
Gosh reading this post sounds so much like a problem I was having a few weeks ago .
i have a 2and half and 13m who normally get on really well but suddenly within a matter of weeks were acting very strange with each other turned out the pup was coming into season and was being very dominant no fighting but near enough i wouldnt have trusted them together alone they stopped playing together and pup became very jealous of just about everything.
I have a friend who is a trainer/behaviorist and gave me some advice on how to deal with it turned out my hubby had a lot to do with it they were mainly arguing over him for his attention she advised us how to deal with it and it worked.
Her season actually ended on Monday and by Tuesday they were playing together grabbing each other legs and having fun they have gone back to normal...hormones are a wonderful thing!
I'm not saying this is the same situation but with your last comment about one of your girls would normally be coming into season I thought it might help.
Roni