What causes hypoparathyroidism in pets?

It is usually caused by insufficient parathyroid gland function or metabolic abnormalities. Clinical signs vary widely, and the exact cause needs to be assessed by a vet through thorough examination.

What tests will the vet perform to diagnose this condition?

Common tests include a blood electrolyte panel and biochemistry profile. Imaging or urinalysis may be added if needed to rule out other causes — your vet will recommend the appropriate workup.

What should I do if my pet seems lethargic or unwell?

Start by recording your pet's temperature, any vomiting, and changes in energy levels at home. Seek immediate veterinary care if your pet has seizures, collapses, or has difficulty breathing. For other symptoms, arrange a consultation as soon as possible.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Hypoparathyroidism in Dogs & Cats: Symptoms, Diagnosis & Treatment [2025]

Hypoparathyroidism causes low blood calcium and high blood phosphorus. Symptoms include muscle twitching and seizures. It may be autoimmune or a complication of surgery, and typically requires lifelong calcium and vitamin D supplementation.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap editorial team

Sources: ACVIM, WSAVA, National Taiwan University Veterinary Hospital

When to See a Vet

Seek immediate veterinary care (emergency)

•Persistent, severe whole-body muscle spasms or convulsions
•Sudden collapse or brief, repeated loss of consciousness
•Rapid breathing with persistent, obvious panting

Schedule a clinic visit as soon as possible (within 24-72 hours)

•Marked depression, prolonged lethargy, or inactivity
•Persistent vomiting with a clearly reduced appetite for more than one day
•Repeated weakness, unsteady walking, or frequent trembling

01What symptoms indicate something is wrong?

This condition commonly presents as reduced energy, muscle weakness, and changes in eating habits. Some pets may also show digestive or neurological signs.

Lethargy, drowsiness, or noticeably reduced activity
Weakness, unsteady gait, or trembling limbs
Loss of appetite or gradual weight loss
Recurrent vomiting or indigestion, and changes in bowel movements
Possible fever or slower-than-normal heart rate

Seek emergency care immediately if you notice the following symptoms:

⚠️ Severe, widespread, and persistent muscle seizures
⚠️ Sudden collapse or repeated brief episodes of loss of consciousness
⚠️ Rapid breathing with persistently laboured respiration

02How can you assess the situation at home? Key observation tips and when to seek emergency care

Keeping a log of key changes at home helps your vet quickly assess and determine the severity of your pet's condition.

Record when symptoms started, how often they occur, and any changes in pattern
Take your pet's temperature daily and note any abnormal readings with the time
Record the frequency and appearance of vomiting, and any changes in diet or appetite
If symptoms persist or worsen, arrange a veterinary consultation promptly

03How will the vet diagnose it? Common tests and procedures

After examination, your vet will combine a physical assessment with blood, biochemistry, and imaging tests to confirm the diagnosis and rule out other causes.

Physical examination

assessment of mental alertness, neurological and muscle responses

Blood tests and electrolyte panel (including ionised calcium)

Biochemistry panel

evaluation of liver, kidney, and metabolic function

Urinalysis

to rule out kidney or urinary tract issues

Imaging such as ultrasound or CT scan if needed for further diagnosis

04How is it treated and managed after diagnosis? Medication, dietary adjustments, and home care

Treatment and monitoring often include supportive care, electrolyte correction, and regular check-ups to track disease progression and medication response.

Intravenous fluids and close physiological monitoring may be required in acute cases
Correction of electrolyte imbalances and metabolic abnormalities based on test results
Dietary adjustments with daily monitoring of symptoms and body weight
Regular follow-up visits to monitor blood and biochemistry values
Referral to an internal medicine or endocrinology specialist for recurrent or complex cases

05What should you prepare before the vet visit? Key information to help your vet quickly identify the cause

Bring a record of when symptoms started, how they have changed, and how often they occur

List any recent changes in your pet's diet, water intake, and elimination habits

Bring a list of all current medications and supplements your pet is taking

If specific blood tests are required, call ahead to confirm the clinic can run electrolyte panels

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.