Her bum is nice and clean this morning, looks just like the picture from last night after I cleaned her up. There is evidence of her pooping, which is a good sign and her bum is still clean.. Nothing backing up. I applied some more Vaseline this morning and she is still in the brooder. I have to go away for a few hours but when I return I will release her back with the rest of the flock, and monitor everyone's behavior. Thanks for everyone's help!