i have a three month old polish chick who is acting really sick. She is outside with six other chicks around her same age. She has seemed fine until this morning. She is extremely lethargic and puffed up. She will barely walk. She is falling asleep like day old chicks do...just while she is standing there. A month or so ago she had what I think was cocci. I treated with corrid and she got better within a week and has seemed fine since. I don't see any evidence of bloody poop. I have moved her inside by herself. And she's just huddled down not really moving much. Eyes and beak look clear. No breathing problems. Any ideas on what could be wrong and how to treat?