Mean Girls
Well Miss Sarabear may be settling in okay, but it seems that some of her pasture mates have opted to stage a protest. Rina, in a bout of teenage drama, has decided that Sara's presence here is unacceptable and ruining her life. Really.
SPATIAL RELATIONSHIPS
Rina has a very large personal space, and gets very cranky when a member of her herd trespasses in said space. It would seem that Sara missed that little tidbit of important information, and had the misfortune to wander just a teensy bit too close to her new leader.

Unfortunately, when Rina explained this egregious error in no uncertain terms [photo right], Sara compounded the problem by rather desperately lashing out in self-preservation before fleeing the scene. Uh-oh: contact. Houston we may have a problem...

To say that Rina was put out by Sara's audacious behavior would be somewhere along the lines of calling a backhanded slap to the Queen of England "an unfortunate incident" (you know, the understatement of the century).
Rina has finally stopped chasing Sara at 5 minute intervals, and has opted to remind Sara of her place only periodically and at a much slower speed. I have also noticed, however, that this is now done from a much safer distance :o)
THE DOMINO EFFECT

Now that Rina is offended by Sara's presence, Lady [Photo right] has decided she feels exactly the same way. Hmmm, can you say brown noser??
Taya only makes ugly faces at Sara when Rina is looking, otherwise she is pretty much ambivalent. She is pleased, though, that she is no longer the resident peon and has been spotted practicing her important new status by butting in front of Sara at the water trough every chance she gets.

Seems Bella doesn't really care one way or the other either, except to be happy that Rina is no longer chasing her around the haypile.
Ahhh well, such is the life when you're a horse. I think it's time for a nap...