owlbears have one thought process, attack, kill, eat, sleep. That's the monstrosity. There's no room in that for anything else. Haven't read any forgotten realms or dragonlance in a long time, but the only monstrosities I can recall being enslaved were the hook horrors to the illithids and that was due to the overwhelming power of illithid psionics, not a level 1 spell.
Griffons = Griffon Calvary, Worgs = Orcs/Goblins, Hippogriffs = ridden and eggs sold for mounts, Fire Toads = Efreeti, Ice Toads = White Dragons...
