Her dropping is mostly fluid with a few bits of solid material and white urates. I would give her some daily probiotics for a week or two, and then give 2-3 times a week. After antibiotics, there may be an imbalance of he gut bacteria. Her crop should be empty first thing in the morning before eating or drinking. Then when she goes to roost, it should have food in it. Is she eating and drinking? If she has symptoms again of a respiratory infection, I would get some testing through a lab such as Zoologix, Vetdna (RAL,) or your vet. She might just have a chronic problem that comes and goes, but crop problems can sometimes have similar symptoms. Checking for lice and mites under her vent, belly, wings, and neck by parting her feathers is easy enough.
