Thank you, everyone. She was a sweet little mare. I find it hard to believe how quickly this progressed. Her pasture mate is missing her as well.
I know some people have mentioned on other threads, to bring the horse over to see the body, but she didn’t even look at her friend. Just promptly started grazing. So of course, when I put her back out in the field, she started calling and getting a bit upset. It will take some time for her to get used to being alone again. I don’t intend to buy/get anymore horses. She was the last one. I do still have the feral pony, but I don’t think the big field has good enough fencing to contain pony and if she got loose, it would be hard to catch her.