I just wanted to update about the situation. Things have gotten worse, and I think it's something physical. She's acting totally bizarre and even the vet is stumped.
My BO called me last night saying Lakota was acting really strange. She said she was lethargic and not eating and just standing alone in the shed again. She said when she went out to grab all the horses for evening feed time, Lakota had been rolling in the shed and was covered in manure.
She led her into the barn because she wouldn't come on her own and she said she just walked right into the wall, like she couldn't tell that it was there.
She called the vet and the vet said to give her banamine and see if she starts to feel better. She gave the banamine and kept checking on her. She said for about an hour, Lakota stood facing the corner of her stall not eating the grain or the hay she had in her stall. An hour later she had nibbled the hay and grain and was facing the other horses now. The vet said there wasn't much she could do until Monday because she wants to do bloodwork and get to the bottom of the problem, rather than treating the symptoms.
So we are scheduled for Monday morning to do some diagnostic stuff.
Then this morning I got a call with an update. Lakota had completely destroyed her stall. She somehow snapped the rigid plastic feeder attached to the wall in half. She ate a good portion of the wood in the stall, and she tore apart and ate a rubber grain bucket.
When the horses were turned out, she kept trying to squeeze between these two boards into another stall rather than walk out the open stall door, and nothing would get her to stop. The BO tried pushing her, spooking her, and swinging a rope at her, and nothing would make her back up. So she left her for a while, and when she came back and cracked the door to come in, Lakota just charged her! She said she did it twice and didn't respond to the check bumps that normally get her to back up.
Once she finally got the halter on and turned her out into her dry lot (which had a gate open into the pasture so all the horses could play today) she just walked back and forth pacing in the dry lot, and never went into the pasture.
I'm leaving to go out there in a few minutes. The vet said to take a digital thermometer to take her temperature because maybe she has a fever. But she said all the puzzle pieces aren't fitting together right. Some symptoms fit with one problem, while others fit with another. Until we have some labs to look at, we don't really know anything. I really hope everything is going to be ok.