Well I had her hauled last night to the pasture at about 9 pm, there was already one gelding and about 6 other mares down there. All the horses looked fine from what I could see in the dark, they all came running up to the gate excited like they normally do. So I put my mare in, and they all took turns and sniffed/touched noses for a second before eating grass. (BTW they all already know each other. I wouldn't have just thrown her in there if she never met them before) Then I left for the night. I was on call the next day at the stable at 3 pm anyway. So I was going to check on her first before I went to work. FYI the pasture is about a mile down the road from the stable.
Anyway when I got there today at 2, I caught Athena, brushed her a little bit, and made sure she was alright because I worry like that. Then I looked at the other horses and noticed some blood on the belgian mare's tail. So I caught her, and tied her up to take a look. She had a serious vertical cut on her vulva that I could tell right away needed stitches. So I grabbed all my brushes, let Athena go, and walked Isabelle (belgian mare) back to the barn.
As soon as I got there, I put her on the cross ties and called the vet out and told the manager about it. While I waited I washed her off a little bit. Vet got there while I was bringing the other mares up from the pasture. Turns out she needed many stitches, and that she was also cut 2 inches inside past her vulva. All of us thought this was weird including the vet, but figured maybe she had some freak accident with a branch or stick maybe itching her butt where she shouldn't have? Because Isabelle makes all the other horses look like wimps, she's queen of the pasture. So we highly doubted another horse would've kicked her. Still possible, but doubtful. So we left her in the indoor arena for the night, and went down to the pasture to check for anything the could have cut her. Found nothing.
Now only my mare and the one gelding have full pasture board, so they're the only ones who stay there 24/7.
Earlier this evening, the manager of the barn texted me saying that the owner of the barn (and the belgian mare) is suspicious, and was having the cops drive by the pasture a few times turning the night because she thinks that someone purposely did this to Isabelle. NOW I'm worried. My mare is so trusting, she'll walk up to anybody. Isabelle is actually a horse who's known to be hard to catch at times! And it doesn't help that the pasture is literally in the middle of a neighborhood. Ugh, I'm probably not going to sleep tonight. -.-