Defecation is commonly treated as a universal feature of animal life, a visible outcome of digestion and metabolic turnover.

From frogs and sponges to jellyfish and tardigrades, scientists reveal how some animals digest food without defecating, ...

As obligate carnivores, cats can digest high-protein diets more easily than foods with low animal protein and high carbohydrates. For some cats, the best sensitive stomach cat food may be high in ...