When I posted this question about mountain dwarves, I got a comment about breaking dwarf stereotypes by having Jungle Dwarves with a cavalry of Jaguars. I said if I thought of something, I'd ask a question.
Congratulations that day is now.
Problems With This Scenario
Now, I'm going to start this off by saying that I don't know if a Jaguar can be properly domesticated. It probably can't. This article goes into detail, but what's relevant here is that Jaguars do not conform to a social hierarchy. Dogs are pack animals, and it's easier to maintain control by making that dog see you as a pack leader. On top of that, as obligate carnivores it may be harder to keep a whole cavalry fed than a traditional herbivorous horse cavalry. Although, if you disagree, feel free to say so!
This is why I'm making the distinction of having them tamed. A tamed animal differs from domesticated animals in that there are no distinct domesticated lineages (ex. Dogs vs. Wolves), but essentially are capable of at least tolerating human contact. The closest analogue in real life would be people who have raised and tamed Cheetahs, but those are gregarious animals. The fact that these things are solitary may make that harder. Unfortunately, this may impede the end goal of being able to ride these things, but that's for another post.
By the way, in addition to the difficulties in taming and feeding a Jaguar, this article goes into greater detail as why they don't make great pets. Basically, you need to be very deliberate and good at reading their body language, or a Jaguar will hurt you. It takes a long time for any level of trust to build between a trainer and a big cat.
So what's the question here?
Now that I've gone ahead and laid out the potential issues in taming Jaguars, my question is this:
Is there any way to work around all the problems in taming/possibly-way-down-the-line-domesticating a Jaguar? Do the potential benefits of having tamed Jaguars outweigh the problems in making this work?
In my mind, this would likely occur because the dwarves are very stubborn and don't like being told something cannot be done. Maybe the Jaguar keepers are their own class of people, like specialized guilds that train this national cavalry or let wealthy dwarven farmers hire them on to man their security.