Coughing at Rest, Tiring Easily: Recognising Heart Failure in Dogs

In this guide

Congestive heart failure develops when the heart can no longer pump efficiently enough to meet the body's needs, and fluid begins to back up, usually into the lungs or abdomen. It is most often a gradual, progressive condition rather than a sudden event, which means early signs are easy to miss.

Common underlying causes

• Degenerative mitral valve disease, especially common in small breeds such as Cavalier King Charles Spaniels, Chihuahuas, and Dachshunds as they age
• Dilated cardiomyopathy, more common in large breeds such as Dobermans and Great Danes
• Heartworm disease, transmitted by mosquito bite and documented across India, with notably higher rates recorded in Northeastern states and among stray dogs, so it is worth discussing prevention with your vet regardless of which part of the country you are in
• Congenital heart defects, present from birth

Early signs

• A soft cough, often worse at night or after lying down
• Tiring more quickly on walks than before
• Restlessness at night or difficulty settling
• Mild weight loss despite normal appetite

Signs of advancing heart failure

• Laboured or rapid breathing, even at rest
• A swollen abdomen from fluid accumulation
• Pale or bluish gums
• Fainting or collapse, particularly after excitement or exertion
• Marked reluctance to exercise at all

Diagnosis and management

A vet will typically use a stethoscope to check for a heart murmur or abnormal rhythm, followed by chest X-rays, an echocardiogram (heart ultrasound), and bloodwork to assess severity and rule out other causes. Heartworm testing is also standard where relevant.

Heart failure itself is not curable, but it is very manageable with the right combination of medications, typically including diuretics to remove excess fluid, drugs to support heart function, and dietary changes such as reduced sodium. Many dogs live comfortably for a good stretch of time after diagnosis with consistent medication and regular vet monitoring. Routine heartworm prevention, straightforward and inexpensive by comparison, is one of the most effective things an Indian dog owner can do to avoid one major cause of this condition altogether.

Common Questions

Q: Can exercise worsen heart failure? A: Uncontrolled or intense exercise can, but gentle, regular activity is often still encouraged, guided by what your vet feels is appropriate for the individual dog's stage of disease.

Q: Does a diabetic dog need a special diet too if it also has heart disease? A: Yes, dogs with heart failure usually need a reduced sodium diet specifically, which your vet can help balance against any other dietary needs.

Article content © Ravi Teja. All rights reserved.