The Coronet is a long-haired breed defined by a single rosette (the 'coronet' crest) centered on its forehead, with the rest of the smooth, flowing coat sweeping back over the body. It was developed in the UK by crossing the crested Crested cavy with the long-haired Sheltie/Silkie.
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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
Pair on continuous floor space
≈ 10.5 sq ft (1500 sq in) for two
Guinea pigs are herd animals — keeping just one is discouraged in many regions. The two-pig welfare floor is ~10.5 sq ft of continuous ground-level floor space; they do not use vertical levels and should not be kept in tall narrow cages. Coronets are long-coated single-rosette pigs — daily grooming, dry substrate, identical floor-space standard.
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Recommended
Roomy C&C cage for a pair or trio
13+ sq ft, C&C grids
C&C (cubes-and-coroplast) grids make it easy to exceed the welfare floor. Hides at each end, a hay rack, sleeping pads, and separate eating/toilet zones cut squabbling. Add ~2 sq ft per extra pig.
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Ideal
Herd pen + daily floor time
15+ sq ft pen plus supervised floor time
Generous pen for a small herd supplemented with daily supervised floor time on washable flooring. More space dramatically reduces stress and boredom-driven behaviours (bar-chewing, dominance squabbles).
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.
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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.
Color & pattern variants
Natural variants occur in the wild; selectively bred (man-made) variants were developed in captivity.
House in pairs or compatible same-sex groups indoors at 18-24°C, away from drafts, damp, and heat. Provide at least 0.7 m² for a pair on a solid floor; fleece bedding or low-dust paper bedding keeps the long sweeping coat cleaner than loose shavings. Offer a covered hay area and easy-clean hides on a single level. Keep the enclosure spotless and dry to prevent the rear coat from matting and soiling.
Diet
Unlimited grass hay as the staple for dental and gut health, a measured daily portion of Vitamin-C-fortified guinea-pig pellets, and daily fresh leafy greens to supply Vitamin C. Avoid muesli mixes. Use a hay rack to keep hay out of the long coat, and provide constant fresh water.
Behavior & temperament
A show and companion breed. Coronets are generally friendly, lively, and curious, with the typical sociable cavy temperament. They are herd animals requiring cavy companions and will popcorn and wheek. The single forehead rosette distinguishes the Coronet from the Sheltie (no crest) and the Crested American (short coat); its purpose is ornamental/show.
Health
The long coat traps moisture, hay, and waste, so the rear is prone to matting, soiling, and fly-strike in warm weather, and the coat over the eyes can cause irritation if left long. Otherwise subject to the standard cavy ailments: dental malocclusion, respiratory infection, bumblefoot, bladder stones, ovarian cysts in older sows, and Vitamin-C deficiency.
Tips, DIY & hacks
Groom several times a week, detangling with a comb and keeping the rear, belly, and face area trimmed for hygiene and clear vision. Many owners keep pet Coronets in a 'sport trim' (short coat) to cut grooming time and reduce matting and fly-strike risk. Inspect the back end daily in warm months, weigh weekly since the coat hides condition, and check feet and skin for mats and bumblefoot.