So he's on a regime of regular temperature taking (with Banamine if the temp is over 102 and a call to the vet if it's over 103), probiotics and electrolytes to encourage drinking. He had a temperature of 102.4F this morning, but his temperature quickly went down after I gave him the Banamine. He still isn't eating, but he's at a good weight now, which hasn't always been the case in the winter, so he's got at least some cushion for weight loss. He's very old but he's a tough little guy, so we're keeping our fingers crossed.
Miranda, whose stall is next to Blackjack's, seemed somewhat disturbed by the vet's visit - vets and chiropractors are pretty low down on her list due to their (a) being strange people (i.e. not my daughter) and (b) engaging in lots of touching and poking, which she objects to. Blackjack's owner commented that she rolled in the stall a number of times while they were there - and she's not colicing. This morning, she seemed a little more aggressive - when she wanted out of the stall and I shut the door I got lots of ear pinning, head snaking and teeth, although she led out OK. When I let her go in the paddock she also briefly pinned her ears as she walked away, which she hasn't done before. One thing that's a bit odd, and disturbing, is that if I stand quietly by the paddock fence, she will deliberately leave her hay pile, which is a good 30 feet from the fence line, walk deliberately towards me with her ears up as though she's coming to greet me, and then as she gets close, charge the fence with ears flat and teeth out - the front feet usually leave the ground as well and her head comes over the fence although she doesn't hit the fence (which she used to do when my daughter first got her). The eyes are pretty scary too - hard and dead looking. Then, as I just stand there (I'm always careful to stand where she can't reach me so I don't have to move if she charges), she switches off and turns away and walks calmly back to her hay as if nothing had happened. It's pretty strange.
I'm going to encourage my daughter to try to think of what to do as if someone had brought her the horse to evaluate and described its behavior improvements and then worsenings - "my trainer did this and the horse was fine for her and then she went to Florida for a month and this happened". My daughter has sunk a lot of time and money into this horse, but I think in order to make a good decision about what to do, she may need to put that to one side.