Small mammals, also referred to as small furries, such as rabbits, hamsters and guinea pigs, are some of the most popular pets in the UK. However, despite being grouped together based on their size, they have different nutritional needs. In the wild small mammals live in different climates and naturally eat different foods. In fact, food suitable for one species can be totally unsuitable for another, with some of them only feeding on plants and others relying on animal proteins in their diet. In this factsheet, the difference between herbivores, carnivores and omnivores are explained and pet owners are encouraged to seek reliable nutritional advice, specific to their pet type. This will help providing a balanced diet, a significant contributor to a healthy happy pet.