Does she seem to be just very uncomfortable or does it seem she is in pain or ill? Most mares will not have a personality change before foaling other than they get real sick of being pregnant. After foaling is a different matter and she may become very protective.
Just very uncomfortable, and somewhat irritable. She was fine with me, but she was unusually unhappy with Misty being close to her fence line. She did stand for me and I felt the area around her tail bone, which was soft.
RoS thinks she looks a little different. Her edema seems to have gone down some, and moved toward the front, I think.
We've just checked on her, and she seems o.k. right now. As usual, we'll be keeping an eye on her.