Large adult dogs have a relatively small digestive apparatus and thus limited digestive capacity. Their intestinal walls are more permeable than those of small dogs, enabling more water to enter the intestines and thus cause a higher water content in stool.

Only a special, highly digestible diet may compensate for these attributes of large dogs: Royal Canin Maxi Adult dog food for large dogs (26 – 45 kg) from 15 or 18 months of age.