What should I do if I suspect my pet has ingested cholecalciferol?

If you suspect ingestion, note the time, keep any packaging, and contact your vet or an emergency clinic immediately. Follow their instructions and head in for assessment.

How will the vet confirm whether my pet has been poisoned?

The vet will combine a physical examination with blood chemistry tests — including calcium and kidney markers — plus imaging if needed, to determine whether your pet has been affected.

How long will my pet need to stay in hospital, and how often are follow-ups needed?

The length of hospitalisation depends on the severity of poisoning; monitoring of calcium and kidney function typically takes several days. After discharge, regular rechecks and blood tests are required as directed by your vet.

Can cholecalciferol poisoning cause long-term effects?

If caught and treated promptly, most animals recover well. In cases of severe kidney damage, long-term monitoring and support may be needed — follow your vet's assessment and guidance.

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

Cholecalciferol Rodenticide Poisoning in Dogs & Cats: Symptoms, Diagnosis & Care [2025]

Accidental ingestion of cholecalciferol rodenticide causing hypercalcaemia

Take 1 minute to check the symptoms first

Last updated: 2026/01/06

Pethealthmap Editorial Team

Sources: AVMA, ACVIM, National Taiwan University Veterinary Hospital

When to See a Vet

Seek immediate veterinary care (emergency)

•Repeated vomiting together with persistent, obvious lethargy
•Markedly reduced urination or no urination within 24 hours
•Persistent rapid breathing or obvious difficulty breathing

Arrange a clinic visit soon (within 24–72 hours)

•Markedly increased water intake and frequent urination
•Persistent poor appetite or repeated refusal to eat for more than a day
•Noticeably reduced activity but still responsive to the owner

01What symptoms indicate something is wrong?

Early cholecalciferol poisoning mainly presents as gastrointestinal and behavioural changes; later stages may involve kidney-related shifts in water intake and urine output, along with pronounced weakness.

Persistent or intermittent weakness and lethargy
Reduced appetite or clear refusal to eat
Repeated vomiting or regurgitation of food
Diarrhoea or changes in bowel habits
Increased water intake and frequent urination
Decreased activity, less interest in interaction and play

Seek emergency care immediately if you notice the following symptoms:

⚠️ Repeated vomiting combined with severe lethargy or altered consciousness
⚠️ Noticeably reduced urine output or no urination within 24 hours
⚠️ Rapid breathing or obvious respiratory distress

02How can I tell if something is wrong at home? Key observations and emergency criteria

Before visiting the vet, systematically recording key information at home helps the veterinarian quickly understand the exposure and track symptom progression.

Note the time symptoms first appeared and how they developed
Use your phone to record video of vomiting, drooling, or abnormal behaviour
Track daily water intake and changes in urination frequency
Keep a detailed log of food portions eaten and any refusal to eat
Preserve any suspected packaging, fragments, or leftovers from what was ingested

03How will the vet diagnose the problem? Common examination steps

The vet will combine a physical examination with blood chemistry tests and imaging to assess electrolytes, blood calcium, and kidney function, then determine the appropriate monitoring and supportive care.

Physical examination

assessing mentation, hydration status, and abdominal palpation

Blood chemistry

calcium, phosphorus, and kidney function (BUN/creatinine)

Complete blood count and electrolyte assessment

ECG

required if blood calcium is abnormal, to check for cardiac arrhythmias

X-ray or ultrasound

to evaluate the abdomen or identify any gastric contents

04How is it treated and managed after diagnosis? Medications, diet, and care guide

The acute phase typically requires in-hospital monitoring and supportive care; after discharge, blood tests must be followed up as directed, with close attention to changes in drinking and urination.

Vital signs and blood values are monitored throughout the acute hospitalisation period
Blood calcium and kidney function are checked at regular intervals
Follow-up visits and recheck timing are scheduled based on blood test results
After discharge, observe eating, drinking, urination, and defecation, and report changes to the vet
If symptoms recur or test results remain abnormal, specialist follow-up should be arranged

05What should I prepare before the vet visit? Key information to help the vet act quickly

Note the time symptoms started and how they have progressed

Bring any vomit, stool samples, or suspected packaging if available

Prepare a record of water intake and urination from the past 24 hours

List all current medications and supplements your pet is taking

Bring any recent blood test results or imaging reports if available

Call the clinic in advance to let them know you suspect poisoning

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.