We had a discussion about something similar a while back.
The conclusion was that an Owlbear is a Monstrosity, not an animal, so it has to be treated differently. Monstrosities follow a different reasoning regarding to D&D rules, than an animal would.
Personally i would love something like that...but i guess this will not be the only time we encounter something "off-quest" like this. And giving everything we encounter more and more options might be a little much.
But who knows, maybe larian heeds all the owlbear lovers
