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Diet and digestion

Rabbits are strict herbivores and are suited to a diet high in fiber, mostly in the form of cellulose. They will typically graze grass upon waking up and emerging from a burrow, and will move on to consume vegetation and other plants throughout the waking period; rabbits have been known to eat a wide variety of plants, including tree leaves and fruits, though consumption of fruit and lower fiber foods is more common with pet rabbits.

Easily digestible food is processed in the gastrointestinal tract and expelled as regular feces. To get nutrients out of hard to digest fiber, rabbits ferment fiber in the cecum (in the gastrointestinal tract) and then expel the contents as cecotropes, which are reingested (cecotrophy). The cecotropes are then absorbed in the small intestine to use the nutrients. Soft cecotropes are usually consumed during periods of rest in underground burrows.

Because rabbits cannot vomit, if buildup occurs within the intestines (due often to a diet with insufficient fibre), intestinal blockage can occur.