I have a Brahma pullet that is about 9 months old.She weighs about 4kg's - I think that is about 10 pounds. Eating and drinking well. Green sloshy poo and a Distended swollen crop. My boy came in this morning saying he saw her "vomiting". No problem with any of the other chickens only she. She do not act sick but I gave her some epson salt. No use going to the vet as the only two we have around here admitted that they do not know much about chickens. Any suggestions?