Marshall said:
I'd be shocked if its ever come up. Wild Empathy is, literally, useless. It uses the Diplomacy DC charts and rules, but the bonus is LVL+CHA. Its nearly impossible to make a successful roll.
Especially since it's one of four (being generous) druidic charisma-related doohickeys, none of which see much use at all:
1) Diplomacy. How many druids take this skill above, say, spellcraft, spot, heal, knowledge (Nature), listen, concentration, etc.?
2) Handle Animal: sort of useful, but since you get such a big bonus when handling your animal companion, it's more of a flavor skill than anything else--I don't think I've made any rolls with this, either.
3) Disguise, using Mask of a Thousand Faces. This isn't a druid class skill, so nobody's going to take extra ranks in it, but still, it's occasionally useful.
4) Wild empathy.
So, charisma tends to be something of a dump stat for druids, probably their least useful stat (excepting possibly strength, since no right-thinking druid melees in their regular form after fourth level).
Rangers are even worse: unless they multiclass, this and handle animal are the only charisa-based skills. Sure they get bonuses on bluff against their favored enemy, but without ranks in bluff, that's not a huge deal normally.
So I'd rank wild empathy as one of the most useless class features in the game.
Maybe you could swap it out for the ability to detect ingested poisons by taste (before you've consumed enough to be affected), with a level+wisdom roll equal to the poison's DC? That'd also be almost completely useless (how often is poison put in your character's food or drink?), but it'd be kinda cool, and I could see it sort of fitting in a ranger's schtick.
Daniel