My 15 month old daughter usually has solid poops. But my sitter just called and said she filled her diaper and it was green/grey colored with stringy stuff that looks like hair. It was softer then mashed potatoes and did have some hard poop in it too. She said it smelled rotten. My daughters poop tends to be on the harder side so this may be poop that she's been trying to get out. She has been eating a lot of fruits especially blueberries.