UGH. Lethargic horse stressing me out

I came out to feed and my moms horse didn't walk over to the gate, when I let them out so I could clean she just stood and stared, she didn't eat and she LIVES to eat. She's super lethargic, but that's it. Her gums aren't pale and she isn't dehydrated. If I listen for a minute I can hear a gut sound. My horse also has been beating up on her so she also has a lovely fresh scrape on her hock. This is so stressful for me! She's my moms pride and joy, love of her life. If it was any other horse I wouldn't worry half as much I gave my mare some hay and pebbles (my moms mare) nibbled, but now is just staring at me. So now its a waiting game, waiting for something to happen.

I feel so dumb being such a freak about it but my horses never get sick..I haven't had this issue before. Boarders horses, sure no biggie. But my moms heart horse?! AHHH.
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Is she running a fever? (over 101?)

Our (horse) thermometer has grown legs and found a new home through our moving multiple times, I'm going to have my mom pick one up on her way home, she's almost back from work.
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Are you saying she will not even eat a treat such as a carrot or horse cookie? Can you see plenty of pooppiles arounjd her that are recent? Does her breathing seem to be labored or rapid?
Colic?

I think its probably colic, she ate a small amount and also drank and is now standing facing a corner. There was the regular amount of poo andd then two relatively fresh nervous poop type soft piles. I think I'm going to walk her in a minute.
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I hate when I hear this. Lets hope for the best.

Opinions on calling the vet? Its around 9:15 PM and she's been like this since atleast 730 when I got here
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Tested it, and she will eat treats happily.
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I'd call the vet if I were you.

Talked to a vet, we think it was the heat! It was really hot today and they didn't have a shelter (we're setting up another pasture with shelter and it has been cold until the past few days). She has now pooped and is interested in food. Weirdly enough she came around significantly when my mom pulled up. I guess he had quite a few horses do that today. Also, her temp was 100.9 and is now 100
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