Use another boarding center, this one seems to have a rule that kicks horses if you're not active every day

Pretty much as Fantasea has stated. There are, unfortunately, a decent amount of player ran boarding centers that will kick your horses if they are frozen for more than a day or even if you are not active for more than a day. Simply put, when you go in to board your horses, before fully committing, right click ((if on pc)) onto the name once selected ((do not worry about DIY/PART/FULL yet)) and look at their rules for boarding with them. If they are all 1 day across the board then remove the horse from boarding there, especially if you know you might not be active every day and try to find boarding centers that are not that stringent on their boarding center rules, might cost more but finding boarding centers that don't have those type of rules is few and far in between and that's why I tended to board at my own stalls, up until I ran out of room.

Alright, thank you guys!!