My 6 year old QH was acting off... not really colicky as I would think just not herself. I was thinking that this was due to one of her pasture mates having to be put down. She was only slightly off her feed, no fever, no rolling, no pawing or nipping at her sides. The only thing out of character for her was that she was lying down (but never rolling) ... but she was always next to the horse that passed away (it was recommended that we wait 1 day to bury him to give his 35 year old pasture mate some time to sink in that he was gone)
Well on Saturday I just figured that I would rather be safe than sorry and had the vet out. Sure enough she was a sick puppy.
Thankfully she is doing much better this morning and did not have to go to the vet hospital as the vet originally feared. She has to be on more sand meds than the other horses since apparently the normal dose is just not quite enough for her.