Degu Fur Chewing: Why It Happens and How to Fix It

Why Your Degu Is Chewing Its Own Fur

A bald patch on your degu's flank, hip or tail base is telling you something, but not always the same thing. Fur chewing, also called barbering, is common in pet degus: in a review of 300 pet degus at one exotics clinic, skin alopecia due to fur chewing was found in 13.33% of animals, tied with lens cataracts, and behind only acquired dental disease at 60.0% [1]. Usually it is behavioural. Sometimes it is a skin disease in disguise.

Fur Chewing, Moulting and Fur Slip Are Not the Same

Normal moulting is diffuse and roughly symmetrical: the coat thins over weeks and the skin underneath stays clean and unbroken.

Fur chewing looks deliberate. Hair is cropped short rather than gone, leaving a stubbly, mown-lawn texture with a sharp edge, usually wherever the degu's own mouth can reach: the flanks, hips, forearms and tail base. When a cage-mate is the culprit, the patches appear where the degu cannot reach itself, such as the back of the neck, while the chewer's coat stays perfect.

Fur slip is different again. In chinchillas, a related reflex releases a clump of body fur when the animal is frightened or roughly handled, so a predator is left holding hair. What is documented in degus is tail slip: never lift a degu by its tail, because the skin may slip off, and if that happens a veterinarian should be called to amputate the tail properly to avoid infection [2].

Why Degus Chew Fur, and What to Change

Degu-specific research here is thin, and honest guidance has to say so. What is documented is that barbering is common in degus, especially those younger than two years, and that it tends to begin after a stressful event such as a small cage size, insufficient exercise, or a lack of burrowing material [2]. Degus are diurnal to crepuscular and live in social groups that rear litters communally [3], so a lone degu in a barren cage has hours to fill. In mice, where barbering is far better studied, enrichment delayed the onset and reduced the prevalence and severity of alopecia [4].

Change one thing at a time and photograph the patch weekly.

• Space and complexity. A bigger footprint plus platforms, hardwood branches, tunnels, a solid-surface running wheel and burrowing material, rotated regularly [2].
• Chewing outlets. Hay at all times, and at least one chunk of hardwood or a wooden toy to gnaw on [2]; see overgrown degu teeth.
• Sand bathing. Offer a sand bath 2 to 3 times per week for 20 minutes [2].
• Company. Degus should never be housed individually unless highly aggressive [2]; in a group, watch for one animal being chased off food or the wheel.
• Diet and stressors. Note what changed before the chewing began, and cut sugary treats: degus fed simple fruit sugars can readily develop diabetes, kidney damage and cataracts [3].

Signs It Is Not Just Fur Chewing

Behavioural fur chewing leaves short hair over calm, intact skin, not redness, scabs, crusting, weeping or thickened skin. If the skin itself looks wrong, stop treating this as a behaviour problem.

Three medical causes mimic it. Ectoparasites are not common in degus but are documented: one degu presented with itchy skin reactions, restlessness and hair loss, with mites resembling Demodex found in deep skin scrapings [5]. Ringworm is a fungal skin infection that spreads to people; in one published case an owner caught it from her pet degus, one of which had hair loss that progressively extended from the cheeks to the entire body [6]. Third is self-trauma from pain: a degu that hurts somewhere chews over that spot, so check the feet for bumblefoot. Persistent ear scratching should prompt a check for mites [2].

None of this resolves from a general article. Your degu's age, cage size, whether it lives alone, and what changed in the weeks before the fur started disappearing all point somewhere different than they would for another degu.

When to See a Vet

• Bald areas with red, scabby, crusted, weeping, thickened or inflamed skin
• A tail that has been grabbed or pulled, or skin that has slipped off or degloved anywhere
• Constant scratching, persistent ear scratching, head shaking, or flinching when handled
• Hair loss spreading quickly, spreading to cage-mates, or alongside a new itchy rash on you or your family
• Fur loss with weight loss, increased drinking, cloudy eyes, drooling, poor appetite or reluctance to move

Frequently Asked Questions

Is my degu or its cage-mate doing the chewing?

A degu can only barber what its own mouth reaches, so self-chewing shows up on the flanks, hips, forearms and tail base. Bare patches somewhere it cannot reach, such as the back of the neck, point to a cage-mate instead.

Will the fur grow back?

If the cause is behavioural and the skin is intact, fur usually regrows once the stressor is fixed, though it can take weeks to months. If the skin is inflamed, crusted or scarred, treat that first.

Is fur chewing actually dangerous?

It is rarely an emergency in itself, but it signals that something in the environment or social group is wrong. In a clinic review of 300 pet degus, only 38 were healthy, so it is worth taking seriously.

Could my degu's diet be causing this?

There is no good degu-specific evidence tying diet directly to fur chewing, so treat it as one factor among several. Fixing it still matters: degus fed simple fruit sugars can readily develop diabetes mellitus, kidney damage and cataracts.

Can I catch anything from my degu's hair loss?

Not from behavioural fur chewing, but you can from ringworm: one published case describes an owner developing a fungal skin infection acquired from her pet degus. Mention any new itchy rash of your own to your doctor.

Does my degu need a friend, or is the cage-mate the problem?

Both can be true: degus should never be housed individually unless highly aggressive, but a badly matched pairing is a stressor too. Watch the food bowl, wheel and sleeping spots for resource guarding.

How much does a vet visit for this cost?

A basic exam usually runs about $50 to $150, and exotic or small-mammal vets typically charge more than standard small-animal rates. A skin workup adds to that and varies widely, from an in-visit skin scrape to a fungal culture.

References

1. Jekl V, Hauptman K, Knotek Z. https://pubmed.ncbi.nlm.nih.gov/21265850/
2. Garduno BM, Holmes TC, Deacon RMJ, Xu X, Cogram P. https://pmc.ncbi.nlm.nih.gov/articles/PMC11788410/
3. Ardiles AO, Ewer J, Acosta ML, et al. https://pmc.ncbi.nlm.nih.gov/articles/PMC4386868/
4. Bechard A, Meagher R, Mason G. https://pmc.ncbi.nlm.nih.gov/articles/PMC3061416/
5. Beck W, Hora F, Pantchev N. https://pubmed.ncbi.nlm.nih.gov/33901932/
6. Tanabe H, Abe N, Anzawa K. https://pmc.ncbi.nlm.nih.gov/articles/PMC10672611/