04-04-2011, 09:31 PM
All dyes will fade, as mentioned. How quickly would depend on how strong the dye is, how easily it holds in the fur (will vary between individuals), and how vigorously your character washes, if at all. A light rain wouldn't wash out all the dye at once, for example, but a bath with some hard scrubbing may get more of it out. In general, I think it's safe to assume that any dye would need to be re-applied within six weeks at maximum -- the previous dye coat may still be slightly visible in six weeks, but it wouldn't be nearly as vivid.