What is the worst color of poop in the world?

Answer 1

That depends on whose poop. For humans check here: http://www.puristat.com/constipation/bowelcolor.aspx Dark red is probably the most scary because it may indicate colon cancer. Also watch for slimy films that float off the surface of the poop after deposition in water. Red is bad. In animals the color of poop often depends on the diet, in particular if humans force certain foods on animals, e.g. industrial grade mush forced onto helpless dogs will often cause a clearly red poop because of dyes.