Cat Open Mouth Breathing When Purring. Cats are obligate nose breathers. The mouth may be open or closed.
Also if gone this far, he will breathe with his mouth open slightly. Take for instance, when a cat purrs in varying degrees of pitch and when a cat is purring with mouth open. Cats breathing fast and purring together could also mean cardiac disease or asthma.
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This has been around for a few months now and the only way i can control it is to pet him for small amounts of time so he doesn't get into the deep purring when this happens. Cats breathing fast and purring together could also mean cardiac disease or asthma. Newly diagnosed, heavy breathing, loud purring, open mouth. Your cat may struggle with inhaling, exhaling or both.