I had three  mares that were living happier ever after. Then my wife suggested we either ride more or sell. In order for her to ride more, she needed something more her speed. We went out and found another mare that is quite nice. She's about 20 years old, but you wouldn't know it by looking and watching her.
Now comes the problem. Introducing her to my other three mares has been quite a chore. The existing alpha is not about to give up her status and It's been ugly as I do not have any stalls. My gals run together is a 40x60 arena. They love it and are exceptionally healthy. I think the arena living has a lot to do with their health.
Now the question. Does anyone have any experience with this type of situation to make the introduction go easier. I've been thru this before but its never been this bad. Is it possible they will never quit squabbling?