Richardson's Ground Squirrel — care sheet

Advanced. These are truly exotic, semi-wild rodents, not a domesticated pet like a hamster or gerbil. They burrow and chew destructively, need an experienced hand to tame, are prone to obesity, and above all they hibernate for months every year, which most keepers are unprepared for. They also don't breed readily in captivity, so sourcing an ethical captive-bred animal is genuinely hard. This is a keeper-choice for someone ready to work around a wild animal's seasonal rhythms, an exotic vet on call, and the law in their state.

In the wild the diet is roughly 90% plant matter, grasses, seeds, grains, greens, legumes and flowers, and about 10% animal matter such as insects. A captive diet should mirror this: a good-quality ground-squirrel/rodent base, fresh greens and vegetables, seeds and grains in moderation, and occasional insects as the protein component. Because obesity is a real risk, portion controlled and monitor weight rather than free-feeding rich seeds. Always provide fresh water during the active season.

They need a large, secure enclosure that lets them do what they're built to do, dig and chew. A deep substrate for burrowing and plenty of solid, gnaw-proof structure are essential, and the enclosure must be genuinely escape-proof because they are strong, determined chewers and diggers. Supervised free-range time in a squirrel-proofed room can supplement the cage but never replaces a large permanent home. Assume they will destroy soft furnishings and anything chewable within reach.

In the wild they live communally in colonies, and the social structure is strongly female-biased, females tolerate other related females but males are far less social and males don't cohabit peacefully as adults. If you keep more than one, related females are the workable combination; mixing unrelated adults or intact males invites fighting. Many keepers keep them singly with lots of human interaction. Do your research on the specific animals before pairing, and be ready to separate.

For most of the year keep them at comfortable room temperature, avoiding extreme heat. The critical point is hibernation: this species naturally cools its body from the usual ~37°C down toward soil temperature, dropping to near 0°C in the depth of winter, with brief spontaneous rewarming episodes every couple of weeks. Experienced keepers provide a cool, safe, dark setting for this dormant period rather than forcing the animal to stay warm and awake. Because getting the hibernation environment right is difficult and risky, this is a subject to work through with an exotic vet before your first winter, never improvise it.

Provide a deep, dig-friendly substrate so they can burrow, tunnelling is a core natural behaviour, not an optional enrichment. Use safe, dust-free bedding materials appropriate for rodents and avoid anything toxic, scented, or prone to causing respiratory irritation. Depth matters more than surface area for satisfying the urge to dig.

Digging opportunities, safe chew items, and things to forage for are the backbone of enrichment, chewing and burrowing are needs, not extras. Scatter-feeding and hiding food encourages natural foraging and helps manage weight. Supervised, squirrel-proofed out-of-cage exploration adds valuable stimulation for a bonded animal. A bored, under-enriched ground squirrel will chew and dig at everything, so give it legitimate outlets.

They groom themselves and don't need bathing. The keeper's real job is monitoring: watch body weight closely (obesity is a common captive problem), keep an eye on the continuously-growing incisors and provide plenty to gnaw so teeth wear naturally, and check for overgrown nails. Any change in weight, appetite, or teeth is worth an exotic-vet conversation.

There's no well-established, widely-cited supplement protocol for this species in the pet literature, so the safest approach is a varied, species-appropriate diet that supplies nutrients naturally rather than guessing at supplements. If you suspect a deficiency, obesity issue, or breeding/pregnancy needs, ask an exotic vet rather than dosing on your own. Never assume a supplement is needed, get it confirmed.

Adults are roughly 28 to 31 cm (about 11 to 12 inches) long including the tail. Weight swings dramatically with the season: at spring emergence females are around 200 to 275 g and males 350 to 450 g, but through summer they deliberately fatten up and can reach nearly 750 g before hibernation. That seasonal weight gain is normal and expected, though in captivity it tips easily into unhealthy obesity if food is unlimited.

In the wild most don't last long, males average around 3 years and females around 4 (a few females past 6). In captivity, spared from predators, sources report noticeably longer lives, commonly cited around 6 years and sometimes 5 to 7. Plan for a genuine multi-year commitment through repeated hibernation cycles.

See a small-animal or exotics vet if you notice: Failure to fatten in late summer, or unexplained weight loss, before the hibernation season.; Not entering hibernation when expected, or a hibernation pattern that looks wrong, get vet guidance rather than guessing.; Trouble arousing normally, prolonged lethargy, or weakness outside the normal dormant period.; Overgrown or misaligned incisors, drooling, or difficulty eating (dental disease).; Obesity or a sudden change in appetite or thirst.; Diarrhoea, blood in stool or urine, or signs of dehydration.; Wounds, abscesses, or signs of respiratory illness (laboured breathing, discharge), especially in newly acquired or wild-caught animals..