Morning from hell, Colic and cold.

This morning started like any other counting heads and giving hay and water.
Odeon my little arab was laying down which he does so didn't think much off it but by the time I had finished giving hay and water to every one he was still laying down and hadn't got up for his hay this is not normal. I keep my horses out all year as it works best for me and them, except for last night.
I walked over to see why he wasn't getting up to hear him winnie the kind of "oh mum help" winnie not the hello winnie. He was very reluctant to get up and when he did was clearly in pain he was trembling all over and looked a bit colicky. I took his temp which was normal cardiac was weak, membranes white, no colour at all, stomach distended little noise so I put two thick stable rugs on to keep him warm, I didn't walk him because his muscles were so tight and I didn't know what I was dealing with.

By the time Dr Boudry arrived he had stopped trembling ( but I had started, convinced it was a twisted gut or piro ) Odi seemed to have warmed up membranes started to return to normal colour cardiac a little better we treated for mild colic and 2hrs latter he was wandering around his field with not a bother much to my relive. Dr Boudry said it was because of the drop in temperature last night and the fact they still have summer coats his body had started to shut down and had caused mild colic along with the other symptoms we saw.
This is something I have never seen before and never want to again, so rugs on tonight!