What are the common symptoms of diabetes in dogs?

Common signs include increased thirst and urination, weight loss, changes in appetite, and lethargy. If you notice any of these, it is best to have your dog examined by a vet promptly.

What tests does the vet use to confirm diabetes?

The vet will typically run a blood glucose test and a biochemistry panel along with a urinalysis to check for glucosuria and ketonuria. Imaging or hospitalisation for monitoring may follow if other underlying causes need to be ruled out.

Does insulin therapy require long-term vet visits?

Yes. Insulin dosing must be individualised by your vet and adjusted through regular follow-up visits. This is combined with a prescription diet and ongoing blood glucose monitoring — speak with your vet about the specific schedule that suits your dog.

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

Uncomplicated Diabetes in Dogs: Symptoms, Blood Sugar Monitoring & Insulin Care [2025]

Canine diabetes requires lifelong insulin therapy and dietary management. Regular blood glucose and fructosamine monitoring helps evaluate glycemic control. Intact female dogs should be considered for spaying to improve blood sugar regulation.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: AAHA, Veterinary Internal Medicine Society

When to See a Vet

Seek immediate veterinary care (emergency)

•Sudden coma or loss of consciousness
•Repeated seizures or involuntary whole-body twitching
•Unable to eat, with persistent vomiting and obvious dehydration

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

•Marked increase in water intake and frequent urination
•Sudden increase or significant decrease in appetite that persists
•Ongoing decline in energy and activity level, with behavior changes

01What symptoms signal a problem?

Uncomplicated diabetes in dogs often first presents as changes in everyday behaviour and eating habits. Pay close attention to shifts in drinking, urination, and energy levels.

Lethargy and reduced activity — less interest in play or walks
Changes in appetite: some dogs eat more than usual, others significantly less
Frequent vomiting or signs of digestive upset, including loose stools
Weight loss despite a potentially increased appetite
Increased water consumption and noticeably more frequent or larger volumes of urination

Seek emergency care immediately if you notice the following symptoms:

⚠️ Sudden collapse or loss of consciousness
⚠️ Repeated seizures or uncontrolled full-body convulsions
⚠️ Inability to eat combined with ongoing vomiting and obvious dehydration

02How can you assess the situation at home? Key things to observe and when to go to the emergency vet

Systematic at-home observation and record-keeping gives your vet a clearer picture of disease progression and treatment response.

Record when symptoms first appeared and note how frequently they occur each day
Weigh your dog daily and watch for a downward trend over a short period
Track daily water intake and the number of urination episodes
Use your phone to capture short videos of energy levels, activity, and eating behaviour
Bring these notes and videos to the appointment to help the vet assess the situation quickly

03How will the vet make a diagnosis? Common tests and examinations

At the clinic, the vet will focus on blood glucose and baseline diagnostics to rule out other conditions and determine whether further imaging or hospitalisation is needed.

Physical examination

assessment of body condition score, weight, mucous membranes, and coat quality

Blood glucose measurement and a biochemistry panel to evaluate liver and kidney function

Urinalysis

checking for glucosuria, ketonuria, and signs of urinary tract infection

Imaging (X-ray or ultrasound) or specialist referral if indicated

Hospitalisation for monitoring may be recommended in more complex cases

04What comes after diagnosis? Medications, dietary adjustments, and home care

Treatment centres on insulin therapy and dietary management, with regular check-ups to monitor glucose levels, adjust dosing, and support overall quality of life.

Insulin therapy is the cornerstone of treatment; your vet will create an individualised protocol
Prescription diet and consistent, timed meals help stabilise blood glucose fluctuations
Short-term hospitalisation may be needed to stabilise glucose levels and address dehydration
Regular follow-up appointments to monitor glucose trends and adjust the treatment plan
Referral to an internal medicine specialist may be recommended if regulation proves difficult

05What should you prepare before the appointment? Key information to help your vet

Prepare a symptom diary noting when signs first appeared and how they have progressed

Record feeding times, portion sizes, and what your dog has been eating recently

Bring a log of daily water intake and urination and defecation frequency

List all current medications and supplements, including names and doses

Bring any recent test results or imaging files (e.g. previous glucose readings or ultrasound reports)

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.