I have a 20 year old (healthy as a 6 year old) broodmare who is 2 months into foal. Her 4 month old has just been weaned a week ago. I came out to the pasture yesterday to find her because she hadn't walked up at feeding time, and found her laying under a tree shivering, even though it was noon. I got a halter and lead on her, then tried to get her up but she would not stand. It took me half an hour to gather three more people, but we finally hauled her up. Angel was cold and clammy to the touch and still shivering, so I put her blanket on her then called the vet. The vet thought she had colicked, so he told me to walk her for 20 minutes then call back if anything happened. Of course, nothing did so I called back and he came out. While I was walking her, she began wheezing, acting like she was in pain, her eyes clouded over and having a watery runny nose. Lucky for us, the vet lives only 15 minutes away. By the time he got there, an hour after I found her, she still had not passed any manure or urine or even tried despite constant walking. The vet checked and found she had some diarrhea and that her bladder was the size of a basketball, he didn't see why she wouldn't have passed that with the walking. He took her temp at 104F and was surprised to hear that she had been freezing to the touch when I found her. He believed it was an infection of some sort, so he gave her a long acting antibiotic, something to relax her and gave us some antibiotic pills and bute.
After he left, she seemed ok for a few hours, mostly slept standing up. When she did move she wheezed so bad it was almost scary. I was also worried because I had not seen her even attempt to pass anything since the previous day. I took her blanket off for a few minutes to make an adjustment and I noticed that she had dropped enough weight in less than 24 hours for her ribs to show without having to look hard, and she has had a grass belly for a while now. At about 6pm, she finally passed some urine but it was only a small amount. Her temp still swings from 96F to 103F and back. I stayed with her all night and she finally seemed to get marginally better at about 3am. She seemed to be slightly more alert and the wheezing lessened some. Once she seemed a bit better, I slept for a few hours. She hasn't gotten any better since that time, but she did nibble at some wheat mash and is drinking some. She has no cough, and has not eaten any moldy hay or anything of the like.
Does this sound familiar to anyone? I've never had a horse do this, let alone a pregnant mare. She was totally fine, if even a little hyper, last night at feeding. She ate all her food and even tried to eat her pasture buddy's.
Also, with her not eating, I have no idea how to get the pill antibiotics in her. I crushed them up and tried to put it in her wheat mash, but she's only nibbling at that. Can I mix them with corn oil and give them to her like I do wormer using a syringe?