So, every Daedric Realm has mortals living in them? Excluding Dagon's deadlands. We have seen the nuthouse(Shivering Isles) and heard of moonshadow, Azura's realm.
Does Hircine have mortals in his realm? Houses? I mean, those drivers in the ES novel where hunting for Hircine. So, could there be inhabitents there? I remembered correctly, there was a house in a hunting realm in Battlespire?
http://www.uesp.net/wiki/Battlespire:Level_5
A cottage, right? Is it Hircine's realm?
The hunting lodge in Battlespire belonged to Mehrunes Dagon. It was a place where he and his top lieutenants hunted for wild game, presumably lesser Daedra. (The mental image of Mehrunes Dagon rampaging after deer and turkey is comical though.) It's also possible that this is the place where the souls of mortals killed by Mehrunes Razor are sent to, and that Dagon takes pleasure in stalking them cat and mouse style. He seems the type who would engage in such recreational activities.
Which brings me to another interesting point about the Daedra Princes and their relations to each other. Sometimes their spheres overlap. Hircine is the Hunter but that doesn't mean Boethiah, Molag Bal or Mehrunes Dagon can't hunt as well. In a similar fashion, the Mythic Dawn cult while worshiping Dagon used tactics more befitting followers of Mephala or Nocturnal - stealth, deceit, trickery, secret murder, etc.
These overlaps in the practices and abilities of both the Princes and their followers are common when you examine it. This may be due to the ever changing nature of Oblivion itself. This may also explain some of the friendly competitions between Daedra princes, such as the ways Sheogorath tricked his fellow Princes in those Shivering Isles books.
It's possible that occasionally Hircine invites his fellow Princes to his realm and challenges them to a hunt. A friendly competition. Perhaps with mortals or lesser daedra as the prey. That's an interesting scenario to ponder, isn't it? We know such a thing is possible and even precedented. So why not?