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Sleeping and resting respiratory rates (SRR and RRR, respectively) are commonly used to monitor dogs and cats with left-sided cardiac disease and to identify animals with left-sided congestive heart failure (L-CHF). Dogs and cats with subclinical heart disease have SRR_mean values <30 breaths/min. However, little is known about SRR and RRR in dogs and cats with CHF that is well controlled with medical therapy. In this study, SRR and RRR were measured by the owners of 51 dogs and 22 cats with stable, well-controlled CHF.

Median canine SRR_mean was 20 breaths/min (7–39 breaths/min); eight dogs were ≥25 breaths/min and one dog only was ≥30 breaths/min. Canine SRR_mean was unrelated to pulmonary hypertension or diuretic dose. Median feline SRR_mean was 20 breaths/min (13–31 breaths/min); four cats were ≥25 breaths/min and only one cat was ≥30 breaths/min. Feline SRR_mean was …