Hypocalcemia in Dogs & Cats: Symptoms, Blood Calcium Tests & Treatment [2025]
Hypocalcemia can be caused by hypoparathyroidism, kidney disease, or eclampsia during nursing. Symptoms include muscle tremors and seizures. Emergency intravenous calcium supplementation can provide rapid relief; identifying the underlying cause is essential.
When to See a Vet
Seek immediate veterinary care (emergency)
- •Persistent whole-body convulsions that will not stop
- •Sudden fainting with loss of consciousness and no response
- •Unable to stand with persistent weakness or repeated collapse
Schedule a veterinary visit soon (within 24–72 hours)
- •Intermittent muscle tremors or mild twitching
- •Noticeably reduced mobility with drowsiness or fatigue
- •Markedly reduced appetite or persistent refusal to eat for several days
01What symptoms indicate something is wrong?
Hypocalcemia commonly affects the neuromuscular system and mental status, typically presenting as changes in activity level and abnormal muscle function.
- Persistent weakness and noticeably reduced activity level
- Loss of appetite or refusal to eat, with changes in water intake
- Frequent vomiting or signs of digestive upset
- Muscle tremors, brief or intermittent convulsions or seizures
- Unsteady gait, stumbling, or difficulty standing
- Abnormal body temperature, shivering, or restlessness and agitation
- If any of the above signs are present, schedule a veterinary appointment as soon as possible
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02How to assess at home: key observations and when to go to the emergency clinic
Key observations you can make and record at home to help your vet quickly assess the condition and arrange appropriate tests.
- Note when symptoms first appeared, how often they occur, and how long each episode lasts
- Measure and record daily food intake and water consumption
- Record a video of any tremors or seizure episodes for the vet to review
- Track the frequency and characteristics of vomiting, bowel movements, and urination
- Take your pet's temperature if possible and record any changes over time
- Seek a vet visit with blood testing capability as soon as possible
03How will the vet make a diagnosis? Common diagnostic tests
At the clinic, the focus is on blood tests and imaging as needed to assess blood calcium levels and overall health while ruling out other conditions.
Thorough physical examination to assess neurological and muscle function
Blood panel including total calcium and ionized calcium to evaluate blood calcium levels
Electrolyte and biochemistry panel to assess kidney function and metabolic abnormalities
X-rays or abdominal ultrasound to rule out underlying organ issues or masses
ECG to evaluate heart rhythm and check for cardiac involvement
CT or MRI scans if needed to clarify the underlying cause
Referral to an internal medicine or specialist service if blood results are abnormal
04Treatment and aftercare: medications, dietary adjustments, and care guide
Treatment and follow-up focus on stabilizing blood calcium, monitoring for symptom changes, and identifying the underlying cause.
- Acute cases may require hospitalization with intravenous monitoring and therapy
- Follow your vet's prescribed medications and home care instructions after discharge
- Make dietary adjustments or start supplementation as directed by your vet
- Attend regular follow-up appointments for blood tests to monitor calcium and electrolyte levels
- Keep a log of symptoms and medication responses to discuss at each follow-up visit
- Return to the vet promptly or seek referral to a specialist if symptoms recur or worsen
05What to prepare before the vet visit: key information to help the vet work faster
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.