Sugar Glider Care Guide

Sugar gliders are palm-sized, nocturnal marsupials from Australia, Indonesia and New Guinea. In the wild they live in colonies in tree hollows and feed on sap, gum, nectar and insects (Merck). That makes them two hard things at once: a pet that needs company of its own kind, and one whose diet goes wrong easily, with bone disease as the result. They also aren’t legal everywhere. California prohibits them, and other US states require licences or ban them (California Department of Fish and Wildlife; Merck).

Care requirements

Need	What to provide
Enclosure	As large as possible: at least 36 × 24 × 36 in (91 × 61 × 91 cm), tall, with mostly horizontal bars no more than ½ in (1.25 cm) apart (Merck)
Temperature	Tolerates 60–90°F (15–32°C), prefers 80–88°F (27–31°C); away from vents and direct sun (Merck)
Humidity	Veterinary guidance gives no specific figure; keep the cage away from vents and direct sun (Merck)
Lighting	No special lighting. Nocturnal: they sleep by day in a nest box or pouch and feed in the evening (Merck)
Diet	About 50% nectar or sap substitute, about 50% protein (insects and glider pellets), with fruit and vegetables under 10%. Add calcium with vitamin D3 (Merck)
Lifespan	About 9–12 years in captivity (Merck)
Social needs	Pairs or small groups; wild colonies hold about 5–12 animals. Kept alone, they need a great deal of attention and still risk stress-related self-harm (Merck)
Legal notes	Banned as pets in California. Other US states require licences or ban them, and keeping four or more breeding females may need federal Animal Welfare Act registration (California Department of Fish and Wildlife; Merck)

The 50/50 diet: nectar and protein

Merck’s veterinary chapter says no single captive diet has yet proved ideal, but its framework is consistent:

• About half nectar. A sap or nectar substitute such as a commercial glider nectar, a product containing acacia gum, or a lory nectar. Merck also describes the homemade Leadbeater’s mix of warm water, honey, hard-boiled egg, high-protein infant cereal and a multivitamin.
• About half protein. Calcium-loaded insects (crickets, mealworms, waxworms, roaches, moths) plus a glider-specific pellet or insectivore mix. Egg, lean cooked meat and the occasional pinky mouse also count (Merck). Hard-shelled insects help reduce tartar.
• Fruit and vegetables under 10%. Merck warns that many are mostly water, short on protein and calcium, and high in sugar.
• A calcium supplement with vitamin D3. Dust or gut-load insects, or sprinkle a multivitamin-mineral powder with calcium on food daily if the diet doesn’t already supply it (Merck).

Feed in the evening, when they are awake, from bowls on a raised platform; Merck notes gliders feel safer eating up high. Dry cat food is a short-term fallback for protein only, not a long-term diet (Merck).

Calcium and hind-leg paralysis

The most common serious diet failure is nutritional osteodystrophy, also called nutritional secondary hyperparathyroidism. Merck says pet gliders fed mostly fruit, with few gut-loaded insects or other protein, are “very susceptible”. The cause is an imbalance of calcium, phosphorus and vitamin D. It starts as weakness in the back legs and progresses to hind-leg paralysis, tremors, broken bones and, in advanced cases, seizures. Caught early, it is treated with cage rest, calcium, vitamin D3 and a corrected diet, but severe spinal deformities may not reverse (Merck). Merck’s veterinary pages give no single target calcium:phosphorus ratio for gliders. The practical safeguards are calcium-dusted or gut-loaded insects and a supplement your vet approves.

The opposite mistake causes problems too. Merck lists obesity in gliders fed lots of fatty, high-protein treats without enough exercise, and iron storage disease, possibly linked to how efficiently wild gliders absorb scarce dietary iron.

Colony animals at night

Wild colonies typically have a dominant male, a few subordinate males and several females. The dominant male scent-marks the group, and newcomers without that scent may be attacked (Merck). In captivity, Merck recommends pairs or small groups. Social stress, from being alone, living with an incompatible cagemate or living in a poor enclosure, shows as overgrooming, fur loss at the tail base, pacing, eating changes, self-injury and, in extreme cases, cannibalism. Males kept without access to females may self-mutilate. If you keep males and females together and don’t want joeys, have the males neutered (Merck).

Because they sleep in their nest box by day and forage at night (Merck), plan handling and feeding for the evening and keep the cage in a room that is quiet during the day.

Gotchas

• One glider “to bond with”. Single gliders are prone to stress behaviours and self-mutilation (Merck).
• Fruit-heavy feeding. It is the classic route to hind-leg paralysis and gum disease (Merck).
• PVC-coated or galvanised wire. Galvanised wire risks heavy-metal poisoning if chewed, and Merck’s veterinary chapter notes anecdotal reports of toxicity from PVC-coated bars. Powder-coated wire avoids both.
• Vertical-bar cages. They are hard to climb. Gliders need horizontal bars and branches (Merck).
• A nest box near the roof. Leave room above it, or elbows rubbing on the roof can tear the gliding membrane (Merck).

Avoid

• Candy, canned fruit and other sugary or preserved foods (Merck)
• Wild-caught insects, and crickets raised on poor diets (Merck)
• Nuts except as occasional treats (high fat) (Merck)
• Almond, apricot, black walnut, cherry and peach branches (Merck)
• Pine and other softwood shavings; cotton bedding that wraps around toes (Merck)
• Wheels with gaps or rough interiors; use a smooth-sided wheel (Merck)
• Unsupervised time out of the cage (Merck)

Signs to see a vet

See a vet promptly for back-leg weakness, dragging legs or tremors, which are early signs of nutritional osteodystrophy (Merck). Also go for fur loss at the tail base, wounds the glider keeps licking or chewing, facial swelling or a bulging eye, which can mean a tooth-root abscess (Merck), and in males a penis that stays out (paraphimosis), which needs urgent treatment (Merck).