Thanks very much but it doesn't work.
There is just no such quest in quest list

. Actually 70% of mods don't want to work in my oblivion

.
Situation in detailes:
I made quick travel to the exit from prison dungeon, left my horse there, and went to the nearby "wolverine" ruins. There i upgreded several of my scills (thanks to bandit bowman

). after that ia made quick travel to the university and left several stuffs in archmage's cupboard. Then i sold other staff and traveled to another ruins. There i saw this message about stabled horse first time

.
After that i checked all stables in Cyrodil without any result

.
Well, i don't think that crabs could kill my horse (it's a Shadowmere after all), and if it dead why this message continue to appear?
And i don't think it felt hurt - i just left it.
I will load this save, now i'd like to know reasons of this situation to prevent it in future
PS Is this a way to left my hors in current place and quick travel without it? To assoult the Oblivion gate for example.