she/he is 4 weeks old she is acting very weak, sleeping all the time, fluffed up. Her crop is soft. Not sure about poop just yet. But the abdomen and intestines are hard and she keeps shivering. She is on chick starter and duramycin-10 and in a brooder under a heat lamp. She has been on the antibiotics for about 6 days and no sign of improvement, seems to be getting worse. Please help!!!!!