Well, I turned off every filter under options and still showed up .. It shouldn't be due to non-skeleton pet, as I've seen others use it without a skeleton pet. Although, I'm not sure if I've seen it on a non-undead pet, which is what the spell description says. I wonder if skeleton illusion or something similar on your pet would make it work.
Yther Ore.
Edited, Dec 22nd 2008 11:31am by Yther