I would add a probiotic to her daily routine - the ones found in yogurt, sadly aren't quite enough. Osco has probiotic in chewable form - strawberry flavored - my kids love 'em. they have to stay refrigerated though.
I would say if she's not having any other symptoms, maybe put a call in to your doc, give more description (floating, loose, hard to pass, distressed, lethargic while having the pale poop episodes... that kind of thing...)though i know you said she seems normal otherwise.
I did find one link for you... i read through it and it explains the science of poop (ha! - kind of funny) and how our body digests, and what things can cause poop to be off in color, texture and smell.
according to this site, it sounds like it 'could' be scary, but it may be simple as well... history of gallbladder problems in your family? could be gallbladder related - they remove those all the time - practically everybody in my family had it removed... i'm sure i'm next.
with the hepatitis stuff, it could be non-invasive to find out.. through bloodwork... I would ask the doctor to do some just so you can put your mind at ease.