Follow Your Veterinarian's Treatment Plan

One of the most important things you can do is administer all medications exactly as prescribed.

Common medications may include:

• Pimobendan

• Diuretics (such as furosemide)

• ACE inhibitors

• Spironolactone

• Other medications depending on your dog's condition

Never stop, start or alter medications without veterinary advice. Regular rechecks allow your veterinarian to monitor progression and adjust treatment as required.

Exercise: Keep Moving, But Don't Overdo It

Exercise remains important for maintaining muscle strength, mobility and mental wellbeing.

Most Cavaliers with stable heart disease benefit from:

• Gentle daily walks

• Sniffing opportunities

• Light play

• Mental enrichment

Avoid:

• Intense exercise

• Exercising during hot or humid weather

• Activities that cause heavy panting or exhaustion

Always allow your dog to determine their own pace.

Maintain a Healthy Body Weight

Excess body weight places additional strain on the cardiovascular system. Aim to keep your Cavalier lean, with easily felt ribs beneath a thin layer of fat and a clearly defined waist.

If your dog has lost muscle due to advanced heart disease, your veterinarian may recommend dietary adjustments to help maintain body condition.

Nutrition Matters

Feed a complete and balanced diet appropriate for your dog's age and health. Unless specifically advised by your veterinarian, avoid making major dietary changes or adding supplements without professional guidance. Some dogs with advanced heart disease may benefit from diets formulated for cardiac patients. Fresh water should always be available.

Monitor Breathing at Home

One of the simplest and most valuable monitoring tools is your dog's resting or sleeping respiratory rate. Count the number of breaths your Cavalier takes in one minute while sleeping peacefully. Many veterinarians recommend recording this several times each week. A consistent increase above your dog's normal rate may indicate worsening heart disease and should prompt veterinary advice.

Attend Regular Cardiac Check-Ups

Routine monitoring helps detect progression before obvious symptoms develop.

Your veterinarian may recommend:

• Cardiac auscultation

• Chest X-rays

• Echocardiography (heart ultrasound)

• Blood pressure measurement

• Blood testing

The frequency of monitoring depends on your dog's stage of disease.

Signs Your Cavalier Needs Veterinary Attention

Contact your veterinarian promptly if your Cavalier develops:

• Persistent coughing

• Rapid breathing while resting

• Increased effort to breathe

• Collapse or fainting

• Reduced appetite

• Exercise intolerance

• Marked lethargy

• Swollen abdomen

• Pale or blue gums

Early intervention often leads to better outcomes.

Reducing Stress

Stress increases the workload on the heart.

Help your Cavalier by providing:

• Predictable daily routines

• Comfortable sleeping areas

• Moderate temperatures

• Gentle companionship

• Opportunities for quiet rest

Many Cavaliers continue to enjoy family life with only minor lifestyle modifications.

Quality of Life

A diagnosis of heart disease does not mean life immediately changes dramatically.

Many Cavaliers continue enjoying:

• Walks

• Holidays

• Cuddles

• Enrichment games

• Time with family

• Favourite treats (in moderation)

The focus should always be on maintaining comfort, happiness and quality of life.

Frequently Asked Questions

Can Cavaliers live a long time with heart disease?

Yes. Many Cavaliers live happily for years after diagnosis, particularly when the disease is detected early and managed appropriately with veterinary care.

Should I still walk my Cavalier?

Usually, yes. Gentle, controlled exercise is often beneficial. Your veterinarian can advise what level of activity is appropriate for your dog's stage of disease.

What is the first sign of heart disease in Cavaliers?

Often there are no obvious signs in the early stages. A heart murmur detected during a veterinary examination is frequently the first indication.

How often should my Cavalier have heart check-ups?

This depends on the stage of disease. Your veterinarian may recommend examinations every 3–12 months, with more frequent monitoring as the disease progresses.

Can diet cure heart disease?

No. While good nutrition supports overall health, there is currently no diet that cures mitral valve disease. Diet should complement, not replace, veterinary treatment.

Should I monitor my dog's breathing at home?

Yes.

Recording your dog's resting respiratory rate is one of the simplest ways to identify early changes that may indicate worsening heart disease. One of the simplest and most effective ways to monitor a Cavalier with heart disease is by regularly checking their Resting Respiratory Rate (RRR) while they are asleep.

The free Cardalis® app makes this easy by allowing you to record your dog's breathing rate over time. Tracking these readings can help identify early changes that may indicate your dog's heart disease is progressing, allowing you to seek veterinary advice sooner.

Key Features

Breathing Monitor: Simply tap the screen each time your dog takes a breath while they are sleeping peacefully. The app automatically calculates their resting respiratory rate (breaths per minute). For most healthy, relaxed dogs, a resting respiratory rate is typically below 30 breaths per minute. A consistent increase above your dog's normal resting rate may indicate fluid is developing in the lungs or that heart disease is worsening. If this occurs, contact your veterinarian promptly.

Progress Tracking: The app stores your dog's breathing records and displays them as easy-to-read graphs, making it simple to monitor trends over time. These records can also be shared with your veterinarian to assist with ongoing assessment and treatment.

Medication Reminders: You can set reminders within the app to help ensure heart medications are given on time and as prescribed.

How to Use the Cardalis® App

For the most accurate results:

• Only measure your dog's breathing when they are in a deep, relaxed sleep—not dreaming, panting or awake.

• Watch your dog's chest rise and fall, tapping the screen once for each complete breath.

• Record the breathing rate over 30 or 60 seconds, and the app will automatically calculate the result.

• Continue monitoring regularly so you become familiar with your dog's normal resting respiratory rate.

If your dog's resting respiratory rate consistently rises above 30 breaths per minute, or is significantly higher than their usual baseline, contact your veterinarian for advice.

The Cardalis® app is available as a free download from both the Apple App Store and Google Play.

Important:The Cardalis® app is a useful home-monitoring tool, but it is not a substitute for regular veterinary examinations. If you notice changes in your Cavalier's breathing, coughing, energy levels or appetite, seek veterinary advice promptly.

Related Articles

• Heart Murmurs Explained

• Mitral Valve Disease (MMVD)

• Life Expectancy of a Cavalier King Charles Spaniel

References

1. Atkins CE, et al. ACVIM Consensus Guidelines for the Diagnosis and Treatment of Myxomatous Mitral Valve Disease in Dogs. Journal of Veterinary Internal Medicine. 2019.

2. Keene BW, et al. ACVIM Consensus Guidelines for the Staging of Myxomatous Mitral Valve Disease. Journal of Veterinary Internal Medicine. 2019.

3. American College of Veterinary Internal Medicine. Consensus statements on canine cardiology.

4. European Society of Veterinary Cardiology. Clinical recommendations for canine heart disease.

5. WSAVA. Global guidelines on nutrition and companion animal care.

Disclaimer

The information provided in the Cavalier Knowledge Centre is intended for general educational purposes only and is not a substitute for veterinary advice, diagnosis or treatment.