What Causes Yellow Jelly Like Diarrhea. If the liver, pancreas and gallbladder suffers from fat malabsorption, feces can become yellow or gray, soft and smelly, as well as difficult to flush away. Learn more about possible causes and when you should speak to a doctor.
A number of conditions may also cause mucus in diarrhea. As a veterinarian, colitis is the number one underlying cause i see for dog poop like jelly. Colitis literally means the colon is inflamed.