TL;DR: A resting respiratory rate over 40 breaths per minute in a sleeping dog is a high-priority medical emergency often indicating heart failure or fluid in the lungs. You should contact an emergency veterinarian immediately and record a short video of the breathing to assist with triage.
What is a normal resting respiratory rate for my dog and why does it matter?
A resting respiratory rate (RRR) refers to the number of breaths a dog takes per minute while they are sound asleep or deeply relaxed. For most healthy dogs, a normal RRR is between 15 and 30 breaths per minute. When a dog consistently exceeds 40 breaths per minute while sleeping, it is a clinical sign that the body is working too hard to oxygenate the blood or is struggling with internal pressure changes in the chest.
Is a high resting respiratory rate in a dog considered a veterinary emergency?
- The urgency level for this symptom is High.
- A sleeping respiratory rate over 40 breaths per minute is often one of the first signs of congestive heart failure (CHF) or fluid accumulation in the lungs (pulmonary edema).
- Contact an emergency veterinarian immediately if this occurs.
- Watch for additional critical warning signs such as coughing, lethargy, or a change in gum color.
How can a video or photo of my dog breathing help the veterinarian?
- If safe to do so, capture a 15-to-30-second video of your dog breathing before you head to the clinic.
- A video allows the veterinary triage team to observe the 'effort' of breathing, such as abdominal breathing or flared nostrils.
- This visual data provides more diagnostic information than a simple number and helps determine if your pet needs oxygen therapy immediately upon arrival.
Clinical Context (Merck Veterinary Manual)
To assess a dog with suspected pulmonary edema that is not in critical condition, the sleeping respiratory rate (SRR) should be evaluated by the owner at home, ensuring the dog is sound asleep in a cool environment. A normal SRR is less than 30 breaths/min; a rate exceeding this indicates tachypnea. If the SRR is elevated, administration of furosemide at a minimum dosage of 2 mg/kg, PO, bid is recommended. A subsequent decrease in SRR after diuretic administration supports a diagnosis of left heart failure.
Chapter: Cardiology
Source: The Merck Veterinary Manual, 11th Edition (Page 102)