Hey Bethan
I hope you do not mind me sharing an experience I had in reply to your having two girls but room for three.
You may have thought of this and I do not wish to upset you or put the mockers on you but I started out with two girls [Cilla was one of them, she is my remaining original girl] and unfortunately I lost one to illness which left Cilla very sad and alone. At the time, it was difficult to find her a companion. I eventually did but sadly, we lost that one also, leaving her on her own once more. Again, I had trouble finding a companion and when I finally did, I made the decision to get two more.
As much as it is not something I wanted to think about, having three meant that if I did lose one, the remaining two would have company and I would have more time to find a replacement. Just my humble opinion but for those reasons and based on my experience, if there is room for three, I would have three.
I was thinking who has just 2 chickens but then I realized probably most sane people

