Originally Posted by
wolfmoonstrike
Mutants in general, have everything mutate ...
For example lets say chicken A is starting to mutate and seeds just don't work anymore and starts to eat animals. Chicken A then starts to mutate to become more predator like, sharp claws, more intelligent, and maybe even able to use individual feathers as darts (or just weapon). So highly prized for their feathers and claws for weapons or highly prized as combat pets.
Now Chicken B is faced with the same problem, mutating and seeds just aren't doing it anymore, but there are no animals around or even really veggies. So of all things it starts to eat rocks thus making its beak grow hard as steel and feathers take on a quartz like feel/look. Highly prized for their beaks as tool components and their feathers for whatever quartz is good for.