I had figured Haver's HP by taking full at first level and D8 half at the other levels but that would bring him to 25 HPs not the 24 I listed so I guess I suck at math... but I guess you roll all HD for ACs so his HP should be 19 or 20...changed that...
His abilities come from this archetype which is from the Animal Archive and the base stats are those for Horse listed under Animal Companions:
http://www.d20pfsrd.com/classes/core-classes/druid/animal-companions/animal -companion-archetypes/bodyguard-companion-archetype
And yeah the Oracle ability is called bonded mount corrected that... I think I was mixing that up with Celestial Servant or what the Aasimar feat for AC is called. However that is worded a bit unclear so I'd need to further discuss that with you.
Where exactly Landa hails from I left open purposely. My initial idea was that she likely hailed from lands a bit further south where regular agriculture was still possible. So maybe Nirmathas or southern Lastwall. But it's really not that important to me, so we can make it work however it works for you.