ModerateSee Vet Soon🫄 Digestive SystemGuinea Pig

Dental Disease in Guinea Pigs

Guinea pigs have continuously growing teeth (open-rooted). Dental problems are extremely common, most often due to improper diet (not enough hay). Overgrown teeth cause severe pain, inability to eat, and secondary GI stasis.

Last updated: 2026-05-07

Severity

moderate

When to Act

See Vet Soon

Symptoms & Signs

Difficulty eating / drooling

Drops food, chews at side of mouth, has wet chin ("slobbers").

Always present

Weight loss

Gradual weight loss despite interest in food.

Always present

Selective eating

Eats only soft foods; refuses hay and hard vegetables.

Very common

Reduced fecal output

Less poop because they're eating less — often smaller, misshapen pellets.

Very common

Facial swelling

Lumps on the jaw from tooth root abscesses or elongated roots.

Sometimes occurs

Behavioral Changes to Watch For

Pets can't tell us what's wrong. These behavioral changes are often the first clues that something is wrong.

🐾 Food interest but inability to eat

Guinea pig comes to the food eagerly but cannot physically eat it.

What You May Notice:

Your guinea pig wheeks excitedly for food, takes a bite, then drops it and gives up.

Causes & Risk Factors

Causes

•Inadequate hay intake (the most common cause — hay is essential for wearing down teeth)
•Vitamin C deficiency weakening tooth structure and supporting tissues
•Congenital malocclusion
•Trauma
•Age-related tooth changes

Risk Factors

⚠Guinea pigs not fed unlimited grass hay
⚠Pellet-heavy or all-pellet diet
⚠Vitamin C deficiency
⚠Older guinea pigs
⚠Certain breeds may be predisposed

How It's Diagnosed

1Oral examination under sedation (essential — cheek teeth cannot be seen in an awake guinea pig)
2Skull radiographs to assess tooth roots, check for abscesses or elongation
3Assessment of chewing motion and jaw symmetry

Treatment Options

procedure

Dental Burring

Mechanical reduction of overgrown teeth under anesthesia.

Steps

1.General anesthesia (essential for thorough examination and treatment)
2.Dental burr to reduce cheek teeth (molar spurs)
3.Burr incisors if needed
4.Smooth any sharp points that are cutting the cheeks or tongue
5.May need repeated every 4-8 weeks depending on severity

Expected Outcome

Immediate ability to eat normally after recovery from anesthesia.

Precautions

!Requires specialized exotic vet with dental experience
!Anesthesia risk in debilitated animals

dietary

Dietary Correction

The ONLY way to prevent recurrence. Hay is non-negotiable.

Steps

1.Unlimited grass hay (timothy, orchard, meadow) — 80% of diet
2.Limited pellets (1/8 cup per day)
3.Daily fresh vegetables with vitamin C
4.Syringe feeding with Critical Care during recovery

Expected Outcome

Natural tooth wear resumes, reducing the frequency of dental procedures needed.

Precautions

!Dietary correction takes time — existing overgrowth must first be treated mechanically

Common Medications Used

Medication	Usage	Important Notes
Meloxicam (Metacam)	Pain relief for dental pain in guinea pigs	Helps the guinea pig eat after dental procedures. Oral suspension.

Prevention

✓Unlimited grass hay for life — this is the #1 prevention
✓Daily vitamin C supplementation
✓Regular weight checks (weekly at home) — weight loss is the earliest sign
✓Annual veterinary checkups including oral exam

When to See a Veterinarian

⚠️Drooling or wet chin
⚠️Dropping food
⚠️Weight loss
⚠️Reduced fecal output

Frequently Asked Questions

How often should I weigh my guinea pig?

Weekly. A kitchen scale works well. Weight loss is often the FIRST sign of dental disease, before you notice drooling or food dropping. A loss of >50g in a week warrants a vet visit.

Prognosis

Good with regular management. Many guinea pigs require repeat dental burring procedures. Addressed early with proper diet, most can maintain a good quality of life.

References

[1] BSAVA — Manual of Rodents
[2] Guinea Lynx — Dental Disease