Hey all- I have a young white leghorn (she's about 8 weeks old) and I noticed she is sick today. She's still on the medicated chick feed. She's overall super lethargic and has no interest in eating or drinking. She's also passing pretty loose and bright green poop. I have her isolated from the rest of the flock and gave checked her over. Her crop feels empty. Her vent looks clear. Her breathing doesn't sound raspy or struggling. There are no signs of nasal discharge. Any help for what might be wrong, what to look for, and how to care for her would be super appreciated! Thanks in advance.