i decided to search for any appaloosa appendix quarter horses, since i've never seen them before in the game. the only 2 currently in the game both have glitched images, i feel like it has something to do with them being appaloosa.
there also seems to be the same issue with warmbloods, though there are 2 who were bred from someone's glitched starter horse and their images show up just fine. i'm curious if the images will glitch out once the foals age up.