So I managed to take a few videos of the horses I'm concerned about, and when I showed them to my mom she agreed that they're not in the best shape and I should keep an eye on them. I thought about posting them here to show you guys, but I'm not sure if that's a good idea since I took these videos in secret.
And she agreed something else I noticed on one of them does not look good. They're both males and one of their sheaths is huge, way bigger than they normally are. Where it's usually a little bump, his hangs way down. I noticed it a while ago, but didn't really think much of it, until I started looking more closely at other males and realized that most of them don't look like that. The only ones that do, are ones that are have some kind of medical condition.