I finally had another member of my realm want to play, and it was my older brother, and he brought along a friend. I didn't play as I was SO TIRED. I logged on today, to a missing horse that had been tied up in my base (his name Brownie). I usually have Spot in there too, which is my main riding horse (shown in pictures), but we logged off at the spawner together and he was there when I logged on. Picture shows 2 empty fence posts, one was for Spot, one was for Brownie.
** Edited Update**
I found Brownie, he was tied up at the tree farm lol