Sort-of sequel to this question.
In that question, I asked about the feisability of domesticating a jaguar with the end goal of making a ridable mount. One good point that was mentioned was that a cat is not exactly built for riding, and that carrying weight could damage the back. This made me think of something that I had read here, about feline-based beasts of burden. While it's more in the vein of cart-drawing cats, there is mention of riding them as well.
Since feline spines are more flexible than horse spines, it reduces their ability to carry weight on their backs. However, a solution mentioned was to have special saddles made that distributed weight along the side of the animal, rather than right on their backs. Think something like a dog backpack.
This leads me to my question:
How would a saddle need to be designed so that a jaguar could handle a dwarven rider?
Now, since I've written the original question, I've been thinking that these jaguars may need to be borderline horse-sized for dwarves to ride. I can buy that there could be selective breeding to make the back more conducive to ride. Also note: the linked source mentions that felines think in vertical space. A feline mount may not hesitate to climb a tree or jump over things. This could definitely factor into saddle design.
When I was thinking about this question, I had originally pictured a jaguar being driven by 2 dwarven jockeys in a dog backpack-like saddle that suspended them on either side of the jaguar. Since the Jaguar is a stalk and ambush predator, speed inhibition may not be as much of an issue. Human jockeys at the lowest are about 126 lbs, but I could cut that down if that's feasible. This whole driving setup probably isn't very feasible, but if anyone wants to weigh in feel free!