I've seen some Orlesians use them as hunting dogs, at least. Which is close to their intended purpose. The dogs themselves seemed happy enough hunting wyverns and ghasts.

[He shrugs, leaning over the pup as the last bit of food vanishes down its gullet so he can scratch Kiter behind the ears.]

He's much bigger than yours, and I don't know how I would keep him fed. He can be a picky old thing and I doubt he'll go in for food gels, much less the pounds of it he'd need. Besides; who would protect my brother then?