I have a 3 year old red comet hen. She hasn't laid eggs in months. recently developed runny diarrhea with horrible smell. She was on bird biotic for 10 days as well as vet rx. She was getting better and then relapsed. She wouldn't eat or drink yesterday. I gave her vet rx and nutri drench with a syringe and some water through the syringe. Today she can't stand. She has vomited green slime. Can anyone give me any suggestions please?