My barred rock chicken has been laying watery eggs for two days in a row. She has been very sleepy and her poop is watery as well. She drinks a lot of water and doesn't eat very much. Her comb is also turning purplish. I took her to a vet and had her wormed about a month ago, so I do not think that worms are affecting her. Can anybody offer possible suggestions on what could possibly be affecting my chicken?