[@Andreyich]

Well, i wasnt fully clear on the Ironbacks! You can keep them, but they just seem a bit to slow to be of real use as a drawing Animal. As mobile weapon Platforms they could work through! 

Fire faith would have been my pick as well, suiting their slaver/warrior culture more then the Cult of the Creators! 

And yeah, if the Corgies have been around a few Khans, that is fine with me! 

Thing is, that the Rats simply havent been around the mall for long enough to really domesticate an Riding Animal en-mass! So your clan would most likely be one of the first, as the others simply rely on carriers and carts. Remember that we are also talking about a multi-story mall, with only limted free space! As such, these animals would only have limites use anyway!