The Patagonian mara is a large, long-legged South American cavy that looks like a cross between a hare and a small deer and forms lifelong monogamous pairs. It needs paddock-scale space to run, mate-bonded company, and is a specialist exotic rather than an indoor pet.
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Small pet rodents kept for their charm and easy footprint, including hamsters, gerbils, and other little caged mammals. Most need species-appropriate enclosure size, deep bedding for burrowing, a correctly sized solid wheel, and an exotics-savvy vet; social needs vary sharply by species, so research whether a given animal should be kept alone or in groups.
From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.
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Minimum
Outdoor paddock
≈ 100 m² (1075 sq ft) secure paddock
Patagonian maras are large pasture rodents — NOT a cage animal. Need a secure outdoor paddock with grass, predator-proof fencing, a sheltered hut, and digging zones. Kept in pairs or groups.
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Recommended
Large pasture pen
≈ 200 m² with shelter & grazing
Larger predator-proof grass paddock with multiple shelters, dig pits, shade, and natural grazing. They are diurnal cursorial runners and need real distance to lope and zoom.
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Ideal
Multi-acre enclosure
Acre-scale fenced grass paddock
An acre-scale grass paddock for a stable group, with natural cover, shelters, and dig zones. Best suited to smallholdings, sanctuaries, and dedicated exotic keepers.
Life & growth stages
How this animal changes through its life — each stage often has its own care, diet and space needs.
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Newborn
Newborn mammals are nursed on their mother's milk. Many are born helpless — blind, deaf, and sparsely furred (altricial, as in dogs, cats, and rodents) — while others stand and follow within hours (precocial, as in hoofed livestock).
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Juvenile
After weaning, juveniles grow quickly and become increasingly active, playful, and independent. Adult coat, proportions, and (in many species) the permanent teeth come in as they approach full size.
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Adult
Adults reach full body size and sexual maturity, with the species' mature coat and build. Sexual dimorphism — differences in size, mane, horns, or markings — is pronounced in some mammals and subtle in others.
Senior
Senior animals show aging signs such as graying fur, reduced activity, and a greater need for veterinary monitoring of joints, teeth, and organ function. Lifespan and the onset of old age vary widely by species and size.
Habitat & enclosure
Maras are cursorial sprinters that can run very fast and bound, so they need a large secure outdoor paddock with running room (far larger than a rabbit run), solid perimeter fencing they cannot jump or dig under, and weatherproof shelters/den boxes. They are not indoor animals. Provide grazing area, shade, and dig spots. Because they are monogamous and social, keep them at least as a bonded pair.
Substrate
Natural earth/grass paddock flooring with dry, bedded shelters (straw or hay). Provide dry resting areas to protect feet. Avoid wet, muddy footing which causes pododermatitis.
Equipment & setup
Secure dig- and jump-proof perimeter fencing, weatherproof shelters/den boxes, shaded resting areas, hay racks, heavy water containers, and enrichment for grazing and running. A safe transport crate sized for a large rodent and gentle restraint methods to avoid panic injuries.
Diet
Maras are grazing/browsing herbivores. Provide unlimited grass/hay, plus grazing on safe pasture, supplemented with leafy greens, vegetables, and a measured amount of high-fiber herbivore or guinea-pig/rabbit pellet. Like other cavies they likely require dietary vitamin C — offer C-rich vegetables or supplementation. Avoid sugary or starchy foods. Constant fresh water and roughage support gut and dental health.
Behavior & temperament
Maras are diurnal, alert, and fast, communicating with hops, stotting, and scent-marking. They form strong monogamous pair bonds and may creche young communally. Hand-raised maras can become tame and tolerate human contact, but they are flighty and need calm handling and a stress-free environment. They are not aggressive but startle easily and may injure themselves bolting if frightened.
Health
Continuously growing teeth mean dental disease if fiber is inadequate; provide constant hay and gnawing material. Watch for foot/hock problems on hard or wet ground, parasites, and stress. Likely vitamin C dependent like guinea pigs. Use an exotics/large-rodent vet. Generally long-lived (up to ~14 years in good care). Check local exotic-pet rules before acquiring.
Tips, DIY & hacks
Keep maras as bonded pairs — they are monogamous and stressed when solitary. Provide genuine running space, not just a hutch. Secure fencing against both jumping and digging. Supply constant hay for teeth and likely vitamin C in the diet. Approach calmly to avoid panic flight and self-injury.
