If it helps, the Race of the character I've been trying this with is Beast (werewolf).
I'm not sure if weretigers are also tagged as Beast race, and maybe that's part of the problem.
As a second note, I noticed a minor graphical bug/glitch with using flowers to dye hair color on werewolf Beast races. The dye changes the color of the hair, but only the hair, the rest of the fur stays the same original color. I'm not sure if this is intentional, but it looks kinda weird. If you plan on changing this, I would recommend also taking a look at the weretigers (which I can't check myself due to the previous issue) just in case.