Hello All!!

I have a 9-month-old Black Cochin who presents with pale comb and wattles, a different cluck (noticeable to the other girls), fluffs her feathers sometimes, eats well, drinks well, poops ok (sometimes watery then goes back to normal), isolates herself so as to not be pecked, but just is not quite right. What does it sound like to you? I have quarantined her away from the other girls. Thanks for your time!