Ive searched for over a half hr.. here looking for posts of black poop, but cannot find any posts. wormed my chickens over 1 month ago. every one doing great. The last 2 weeks, my one hen has been leaving black poop. Little mooshy. The color of tar. She's eating normal, acting normal. Any one familiar with this. Any links that might be helpful? Been searching at pics the last 2 days. No luck.