Which species has the slowest minimum respiration rate among those listed?

Which species has the slowest minimum respiration rate among those listed?

• A. Cat
• B. Dog
• C. Rabbit
• D. Ferret

Answer: (B)

Resting respiratory rate shows how slowly an animal breathes when it is calm. In general, larger or lower‑metabolism animals tend to have slower minimum breathing rates, while smaller or higher‑metabolism animals breathe more quickly even at rest. Among these species, the dog can have a resting rate as low as about 10 breaths per minute, whereas cats typically rest around 20–30 breaths per minute, rabbits around 30–60, and ferrets roughly in the 33–60 range. Because the minimum observed breathing rate for dogs is lower than the others, the slowest minimum respiration rate among the listed species is in the dog.

Resting respiratory rate shows how slowly an animal breathes when it is calm. In general, larger or lower‑metabolism animals tend to have slower minimum breathing rates, while smaller or higher‑metabolism animals breathe more quickly even at rest.

Among these species, the dog can have a resting rate as low as about 10 breaths per minute, whereas cats typically rest around 20–30 breaths per minute, rabbits around 30–60, and ferrets roughly in the 33–60 range. Because the minimum observed breathing rate for dogs is lower than the others, the slowest minimum respiration rate among the listed species is in the dog.