Quote Originally Posted by The Glyphstone View Post
That wasn't hatred, that was fear. They'd overheard what Cain and Amberley were saying about Genestealers infecting their victims and misinterpreted it as the 'Stealers being able to 'infect' the entire Kroot race that way.
More to the point, they misinterpreted it as being able to hijack the self-determined evolution of the Kroot race, which is pretty much anathema to the closest thing they have to a religion and certainly about the only thing you could threaten a Kroot with that they would find naturally and insufferably repugnant. I didn't count the 'Stealers, though, because nobody likes Tyranids.

Quote Originally Posted by TechnoScrabble View Post
What WOULD happen if the kroot ate Tyranids? Or a psyker? Or chaos dudes?
Tyranids? Depends on the species, but they'd probably start to develop some nid-like traits. Thickened, chitin-like bone plates, maybe, or nasty talons, and certainly better reflexes and nasty toxins. I expect that any Kroot Kindred that spent long enough eating Tyranids would wind up as hybrids between Headhunters and Bold Hunters. They don't seem to be able to evolve psychic powers from eating psykers, since we've got a history of Kroot who eat Eldar becoming more agile and mentally alert rather than spontaneously able to lift things with their minds, but there's no telling that a Kroot who ate enough psykers wouldn't develop psychic powers of their own.

As for Chaos... Well, they don't. Kroot can taste the taint of Chaos on their prey, and Shapers can detect it without even taking a nibble first, and they don't like it. A Kroot deviant enough to want to eat Chaos-tainted corpses, or degenerate enough not to notice or care, would be quickly put down by the nearest Shaper for polluting the bloodline of the Kroot as a species.