Board Thread:Warhammer 40k General Discussion/@comment-197.69.17.212-20131118192533/@comment-213.114.144.58-20131203224837

Orks are sufficiently different from other sapient species in how they think and feel that it is difficult for chaos (created by human & eldar thoughts and vices) to corrupts Orks. Or get much of any "nutrients" from them. Also, orks have gods of their own and they dont like to share their followers.

I think it was written somewhere that small groups of orks could be corrupted by chaos if left alone. But the more orks that gather in one place and the more Whaag there is, the harder it is for chaos to maintain any sway over the orks. Also, normal orks tend to consider chaos corrupted orks to be un-orky and kill them. Which means that a chaos ork that want to survive must only spend time with other chaos orks or by themselves.