What are the early signs of diabetes in cats?

Common early signs include reduced energy, increased thirst and urination, ongoing weight loss, and changes in appetite. If your cat shows several of these signs, book a veterinary appointment promptly for a blood glucose check.

How can I help the vet assess my cat's condition at home?

Keep a daily log of your cat's water intake, food consumption, vomiting episodes, and urination frequency. Weigh your cat weekly and take photos or short videos of any symptoms — this information is very helpful for your vet at the appointment.

Can uncomplicated feline diabetes be cured?

Some cats with uncomplicated diabetes can achieve good long-term stability or even remission with insulin therapy and dietary management. However, ongoing monitoring and regular vet-guided adjustments to the treatment plan are necessary.

What should I monitor at follow-up appointments?

Key things to monitor include blood glucose or urine glucose levels, body weight, appetite, and activity level. Your vet will adjust the insulin dose and dietary plan based on these results at each follow-up visit.

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 Feline Diabetes: Symptoms, Blood Glucose Monitoring & Treatment Guide [2025]

Feline diabetes is a common endocrine disorder with hallmark signs of increased thirst, frequent urination, and weight loss. With insulin therapy, dietary management, and regular monitoring, some cats can achieve remission.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: ISFM, ACVIM, Taiwan Academy of Veterinary Internal Medicine

When to See a Vet

Immediate veterinary care needed (emergency)

•Persistent lethargy or unresponsiveness for an extended period, with extremely low activity
•Continuous vomiting with clear signs of dehydration
•Rapid breathing, or gums that turn purple or pale

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

•Noticeably reduced alertness or activity
•Persistent appetite changes or refusing food for more than one day
•A clear increase or change in water intake or urination

01What signs indicate something is wrong?

Uncomplicated feline diabetes typically presents with outward signs related to metabolic changes. Recognising these signs early helps ensure timely veterinary care and monitoring.

Lethargy and noticeably reduced activity levels
Decreased appetite or sudden refusal to eat
Repeated vomiting or abnormal vomit contents
Progressive weight loss without intentional dieting
Frequent urination or a significant increase in litter box output
Increased water intake alongside continued weight loss

Seek emergency care immediately if you notice the following symptoms:

⚠️ Persistent stupor or prolonged unresponsiveness with extremely low activity
⚠️ Continuous vomiting with obvious signs of dehydration
⚠️ Rapid or laboured breathing, or gums that appear purple or white

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

Observing and recording key changes at home gives your vet a clearer picture of your cat's condition, enabling faster diagnosis and appropriate testing.

Record daily changes in alertness and activity level
Estimate and note daily water intake and food consumption changes
Log the number of vomiting episodes, timing, and vomit contents
Weigh your cat weekly and keep a weight log
Schedule a veterinary visit promptly if you notice significant changes

03How will the vet make a diagnosis? Common diagnostic tests

At the clinic, your vet will begin with a physical examination and follow up with blood work and imaging to confirm blood glucose levels and exclude other conditions.

Full physical examination

including body weight, temperature, and mucous membrane assessment

Blood tests

fasting blood glucose and complete blood count

Biochemistry panel

liver and kidney function, and electrolyte levels

Imaging (X-ray or CT scan)

to rule out other underlying causes

Bacterial culture or other targeted tests

if infection is suspected

Choose a clinic equipped for blood glucose monitoring and diagnostic imaging

04How is the condition treated and managed after diagnosis? Medication, diet, and care guide

Treatment aims to control blood glucose and maintain a good quality of life. Ongoing monitoring and regular treatment adjustments are essential.

Intravenous fluids if needed to correct dehydration and stabilise electrolytes
Insulin therapy initiated and adjusted by your vet based on response
Prescription diet with controlled carbohydrate content
Home monitoring of blood glucose or urine glucose levels
Regular follow-up appointments to adjust treatment and assess progress
Referral to a specialist or dedicated diabetes monitoring programme if required

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

Write down when symptoms started and how they have changed over time

Note daily food intake, water consumption, and any changes observed

Record the frequency of vomiting, urination, and any changes in urine output

Bring a list of all current medications and supplements

Capture video of any symptoms and bring previous test results or medical records

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.