I noticed it yesterday on one chicken. Sticky looking white poop on the rear-end of one of my hens. Today it is on several of them. I also noticed that in the run and coop there seems to be a lot of yucky green poop. I saw one hen (an older one) who really looks like she just doesn't feel well, go poop and it was clear liquid. Any ideas what is going on? They have metal waterers so ACV isn't really an option. Thanks!