White stool isn't normal and should be evaluated promptly by a doctor. White or clay-like stool is caused by a lack of bile, which may indicate a serious underlying problem. Bile is a digestive fluid produced by the liver and stored in the gallbladder. Stool gets its normal brownish color from bile, which is excreted into the small intestine during the digestive process. If the liver doesn't produce bile or if bile is obstructed from leaving the liver, stool will be light colored or white.
Gastrointestinal Parasites of Cats
Pinworm infection - Symptoms and causes - Mayo Clinic
When a dog is dewormed, especially a puppy or relatively young animal, you may spot dead worms in the feces. With puppies , it's not uncommon to see live worms in the stools before they are treated for the infestation, and then dead or live worms excreted in the stool after treatment. Infected dogs may also vomit or have diarrhea, cough, develop pneumonia or show signs of anemia. Owners may spot worms in their dogs vomit or feces. These worms can infect both young and old dogs and can become fatal by causing intestinal blockage if they are not treated as soon as possible.
Parasites in the stool
Ascariasis worms are typically pink or white with tapered ends. Female worms can be more than 15 inches 40 centimeters long and a little less than a quarter inch 6 millimeters in diameter. Male worms are generally smaller.
It is a fact of life that even the cleanest of people can pick up an intestinal worm. You can become infected with these parasites from infested animals, tainted food, water and even walking around barefoot. While many types of intestinal worms are invisible to the naked eye, others are quite easy to identify.