You have a carrier? I would put something soft in there like a towel or if you have them, some puppy pads work well to catch droppings.I am pretty sure we don't have antibiotics. And I am def bringing her in tonight, her crop feels fullish of liquid and around her eyes is looking pale. What should I do in preparation for bringing her in?
Offer her water, you can give electrolytes or a little sugar water if you wish. Food, if she's willing to eat that's fine, if not, then it's ok as long as she's getting some fluids.
Are you going to clean her up? If so, access her before you do. IF she's really lethargic, then you may only want to just wipe off the poop the best you can instead of washing her bum. Getting them wet and handling a lot if they are lethargic can be stressful.