Roughage refers to the indigestible parts of plant-based foods, such as the fibrous parts of fruits, vegetables, and whole grains. It helps in proper digestion, adds bulk to the diet, and promotes regular bowel movements. Full definition
Rabbits tend to seek out and chew on soft materials such as wood or soft furnishings, carpet and wallpaper for a variety of reasons, Their teeth grow constantly through out their laves and they are always on the lookout for things to help wear them down, They also need a lot of roughage in their diet and are always on the lookout for digestive fibber. (bunnyproof.com)
Spinach can act as roughage in your dog's diet while providing antioxidants and iron. (akcpetinsurance.com)
Tasty spinach leaves provide roughage for your bunny and are a source of vitamin A, which is necessary for healthy rabbit growth. (animals.mom.me)