Hello, I have a 5 month old chick that is not acting herself and hasn't been for about a week. She laid down in the dirt all day yesterday, but did roost with the others last night. Her poop is runny yellowish - I just took this picture 5 min ago. She is drinking and eating a little but lethargic. They are on layer feed, have plenty of grass etc and treats / table scraps from us. We keep the coop pretty clean, plenty of clean water available. Can anyone tell me what I should look for, where to start in helping this girl get better? Thank you! .