singapore rabbits

uterine cancer in unspayed female rabbits in Singapore

updated 13 May 2026

if you have an intact (unspayed) female rabbit, you should know about uterine cancer. it’s not a possible complication — it’s a likely one for any doe over age 3.

this guide covers why spaying matters so much for female rabbits, and what to expect if the disease has already developed.

the statistics

studies on unspayed female pet rabbits show:

  • by age 3: 30-50% have developed uterine adenocarcinoma
  • by age 5: 50-80%
  • by age 7: 80-95%

this is not a small risk. it’s a near-certainty if the doe lives long enough.

the implication: female rabbits should be spayed by 6 months or as soon as practical. our spay cost guide covers timing.

the disease progression

stage 1 (early, often pre-clinical):

  • small tumor in uterine wall
  • often visible only on ultrasound
  • no symptoms

stage 2:

  • tumor growing
  • some abnormal vaginal discharge
  • occasionally a small amount of blood in urine (from uterine tumor, not bladder)
  • weight changes subtle
  • this is when annual exams catch it

stage 3:

  • significant uterine enlargement (may be palpable)
  • chronic blood in urine
  • weight loss
  • decreased appetite
  • often visible on routine vet exam

stage 4:

  • significant disease
  • often metastatic (spread to lungs, liver)
  • significant weight loss
  • lethargy
  • the cancer is usually beyond curative treatment

the signs to watch for in unspayed does

blood in urine is the most reliable presenting sign. specifically:

  • intermittent reddish urine that turns out to be blood
  • worsening over weeks
  • the female rabbit otherwise looks normal in early stages

if you have an intact doe and see any blood:

  • treat as suspicion for uterine issues
  • vet visit same week (not waiting)
  • our blood in urine guide covers the diagnostic approach

other signs:

  • abnormal vaginal discharge
  • abdominal distension
  • weight changes
  • decreased appetite

the diagnostic workup

at the vet:

  • thorough physical exam including abdominal palpation
  • ultrasound to assess uterus
  • blood work
  • possibly chest X-ray to check for metastasis

cost: SGD 200-500 for full workup.

the treatment options

depends on stage:

stage 1-2 (localised, not metastatic):

  • spaying (ovariohysterectomy) often cures
  • spaying done at any age, but emergency spay vs planned spay
  • post-op care similar to standard spay
  • prognosis good if caught early

stage 3 (locally advanced):

  • spaying still recommended
  • combined with histopathology of removed tissue
  • chemotherapy sometimes discussed for rabbits (rare)
  • prognosis depends on extent

stage 4 (metastatic):

  • generally palliative care
  • pain management
  • supportive nutrition
  • quality of life decisions

the prevention argument

every veterinarian and rescue in SG advocates spaying female rabbits, primarily because of this disease. if a doe is spayed before age 3:

  • uterine cancer risk drops to essentially zero
  • the surgery is straightforward at a young age
  • recovery is good
  • the doe lives normally to old age

if a doe is left intact:

  • the math favors cancer development
  • by age 5-7, the disease is highly likely
  • treatment becomes more complex
  • prognosis depends on stage

cost-wise:

  • spay at 6 months: SGD 350-700
  • emergency spay for stage 2-3 cancer: SGD 500-1500
  • treatment for metastatic disease: SGD 1000+ over weeks

the math overwhelmingly favors early spay.

the older intact doe consideration

if you have an older intact doe (4+) without obvious signs:

  • discuss with your exotic vet
  • ultrasound to assess current status
  • spaying at this age is more complex but still beneficial
  • weighing surgery risk vs cancer risk

an older spay should be performed only after pre-op blood work and careful assessment. our anaesthesia guide covers what matters.

the rescue and shelter consideration

most SG rabbit rescues:

  • spay/neuter all rabbits before adoption
  • this is why adopted rabbits from rescue are spayed
  • if you adopt, you don’t have this concern

pet shop rabbits typically are not spayed:

  • the owner is responsible for arranging this
  • often happens between 4-6 months
  • our adopt vs buy guide discusses these differences

the SG-specific considerations

three things relevant:

1. SG vet availability.

  • multiple exotic clinics offer spay
  • volume of rabbit surgery matters
  • choose experienced clinic for any rabbit surgery

2. emergency vs planned.

  • planned spay (age 4-8 months) is straightforward
  • emergency spay for advancing disease is complex
  • big cost and outcome difference

3. multi-pet households.

  • unspayed does often have hormonal issues that affect bonding
  • spaying improves both individual health and household harmony

what owners often get wrong

three patterns:

  • postponing spay because the rabbit “is fine.” they’re fine until they aren’t. the risk window is age 3-7
  • dismissing slight blood signs. any blood in urine in an intact doe should be investigated
  • assuming “she’ll just grow out of it.” the disease progresses; it doesn’t go away

community-sourced information here is not veterinary advice. for any health concern see a licensed SG exotic vet.

community-sourced information, not veterinary advice. for medical issues, see a licensed SG exotic vet — start with our vet directory.

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