Disclaimer: this is from a combination of my own memory and some quick searches and double-checking between various results, so feel free to look up stuff to double check and/or get more accurate information.
Gonna start off with Zerda:
Zerda are based on the fennec fox, which are pretty decent jumpers for their size, though from a quick search, it's mostly height and not distance. Either way, they'd likely be pretty good at taking a fall, thanks to the fluff, and small size overall. Though, notably, looking at the weights for my Zerda, at least, it seems they're quite a bit heavier than the fennec fox itself. So, overall, pretty decent, likely can jump 2-3 times their own height into the air, but not the greatest at distance.
Jocol:
Based on the Coyote, iirc, they'd likely be rather good jumpers. Just from a quick search, it seems coyotes can jump somewhere about around 6 or 7 feet into the air, and an impressive 10 to 12 feet forward.
Lupin:
Based off of the Grey Wolf, if I'm remembering correctly. From some quick searches and whatnot, it seems that a wolf's jumping prowess is probably a bit lower than a coyote, but still rather impressive, and close enough to it to keep up with them. So, probably about the same, if a slight bit weaker than the Jocol's jumping.
Kit:
Based on the Red Fox, they'd be pretty decent. Red foxes seem to be capable of jumping a good 4 to 6 feet into the air, though I can't seem to find a distance, and I don't feel like putting more time into this right now. Maybe I'll come back later, lol. Either way, as the largest of the true foxes, they are at least better jumpers than Zerda (the smallest canid), just thanks to being larger, giving them more distance overall.
Bracchus:
Based on the Maned Wolf.
I can't seem to find any distances or heights for their jumps, and they mostly rely on their long legs to simply run down prey. I'd guess that they probably are slightly weaker jumpers than wolves, thanks to being adapted to mostly flatter areas, (iirc), but they do also have the advantage of very long legs. So, decent-ish?
Volmyr:
Based on the Fruit bats aka Megabats aka Flying Foxes.
Volmyr would actually likely be the absolute weakest jumpers. Bats pretty much can't jump, and have terrible leg strength, when it comes to springing off of things. Furthermore, bats can't take off of the ground, so their wings would likely just hinder them. Even factoring in that they've been given wolf strength, and a larger stature, their bodies are likely just not well adapted to jumping, leaving them with rather weak jumps. Luckily for them, though, bats are excellent climbers, so even if they aren't able to take off from the ground, they could still easily scale cliffs. And (not accounting for mass and whatnot) they'd probably be decent fliers once they get into the air, so they do have that. So, overall, terrible jumps, decent flying, and excellent climbing.
Breakdown of my rankings:
1st place: Jocol
2nd place: Lupin
3rd place: Bracchus?
4th: Kit
5th: Zerda
and 6th: Volmyr
Feel free to correct me if you see that I got anything wrong, or made a mistake on! ^w^