Kindred's passive doesn't work and ult doesn't fit
There is no reason the enemy should be allowed to see the marks in their jungle. It's not as if you get complete vision of a Shaco or Evelynn who comes into your jungle to kill you, and they don't even have to go into the enemy jungle to do their job. Making it skuttle for the first mark doesn't mean much either, since in both scenarios the enemy can and will be able to beat you in a duel. There are very few junglers with the base stats to lose to Kindred in a 1v1. L
It should be exactly like fighting an Ivern. You ward extra and change your path to account for the fact he's extremely likely to come into your jungle.
As for the ultimate, it makes no sense with the theme of the champion nor the rest of the kit. The duality of the champion is not life/death, and the fact every other ability lamb uses is a damage dealing arrow attests to that. But even in the lore, Lamb is no less of a killer than Wolf. She is the option of a quick death by arrow while he chases those who run from their fate. There is no respite. Even in their short story, she isn't saving a woman, it simply wasn't her time yet and Lamb returns when it is.
My recommendation is to turn wolf into an actual pet for a time, with a slow every three attacks like the E and changed effects for the W and E while it's active. And a full body model. Maybe a leap with every one of Wolf's autos while inside the W's range along with the %hp damage it normally does. And the E could reset the center position of the W every time it procs.
Even if my idea seems like it'd never work, it still stands the ult doesn't fit. Like Rek'sai, it just needs to be completely changed.
(same thematic, hunter).
's concept is a failure (even if I love the theme of this champ)