Quote Originally Posted by Forrestfire View Post
Kroot that fight (and eat) anything become more like it. For instance, Kroot that ate Dark Eldar in one war became progressively more brutal, cunning, and sadistic as it went on because they take on cultural and physical aspects as they eat more and more of any one specific prey.
Providing they do eat it, at least - their Shapers can sense Chaos and Tyranid-tainted genes, for instance, and won't touch them.

That might be something the Culture would be interesting in investigating, once they're better friends with the Tau - the Kroot ability to function as living genetic scanners and their instinctual ability to rewrite their own genetic code.