There are a lot of people on here who "lurk" and don't post much!
Katy, I'm just curious if you have Rosie's mom or dad (assume mom)?
I completely understand what you mean about two female dogs living together (I still have problems calling them the "B" word that isn't basenji, lol)…. I had my Lola and my daughter's dog Sophie in the house together for about 2 weeks. Both dogs are as sweet as can be when they are the only female around, but once they were in the same household, well, they both turned into snarky competitive snotty sisters! I certainly learned to read their attitudes and fur coats (hair raising!)....
The only way I could "control" them, lol, was to make them run with me, but I had to take the lead from both of them... which meant running quite fast :), and have them running side by side behind me. Good exercise for me, that's for sure! I lost 3 pounds during that time!
I dearly love both girls, but the minute Sophie went back home, there was a collective sigh of relief in our house.... our Lola is happy with her male rat terrier companion, Joker, and they play wonderfully together.