So for about a week now my chicken has been very lethargic and droopy, we took her to the vet and he gave her some antibiotics which are not helping. I noticed this morning that her crop did not empty, it is the size of a plum and extremely dough and holds it shape when you knead it. However$, her breath is not smelly. She is eating mainly grass and is drinking a little. Her faeces are extremely watery. The vet did a faeces test and no traces of worms were found. I am extremely confused, what does she have and how can I treat it?