I am a newbie. I am not sure which one but poop looks like tar or thick molasses also the color of molasses. They are acting normal. I had some organic fertilizer out. Could they have eaten that???
That's cecal poo and totally normal. Every so often they have a poop like that. You can do a search for it and see that your chickies are fine.
ETA this link: everything you'll ever want to know about normal and abnormal chicken poo. http://www.chat.allotment.org.uk/index.php?topic=17568.0