Chacoan mara the capybara, and guinea pigs. Chacoan maras are closely related to the other member of the genus "Dolichotis", the Patagonian mara. Maras are the fourth largest rodent in the world after the capybaras, beavers and porcupines . Though the mara may look like a rabbit, the rabbit is not actually a rodent and therefore not as closely related to the mara as one might expect. Chacoan mara The Chacoan mara, Dolichotis salinicola, is a relatively large South American rodent of the cavy family. They are a close relative of the better known Patagonian mara. The Chacoan mara lives in the
Guinea pig are eaten directly from the anus, unless the guinea pig is pregnant or obese. They share this behaviour with rabbits. In geriatric boars or sows (rarely in young ones), the muscles which allow the softer pellets to be expelled from the anus can become weak. This creates a condition known as "anal impaction", which prevents the animal from redigesting cecotropes even though harder pellets may pass through the impacted mass. The condition may be temporarily alleviated by a human carefully removing the impacted feces from the anus. Guinea pigs benefit from a diet of fresh grass hay, such as timothy