I think you mean purring -_-. purrrrfectly natural, just means they are happy.
If you are seriously concerned that your cat is breathing abnormally, call a veterinarian (you can find them in the phone book) in your area and ask them about it.
It is possible that your cat is just reacting to the stimulation of the catnip and may be breathing faster as a result. However, if the breathing continues to be abnormal or if you notice any other concerning symptoms, it would be best to consult with a veterinarian to rule out any potential health issues.
When a cat breathes fast while purring, it could be a sign of excitement or stress. Purring can sometimes cause a cat to breathe faster as they try to regulate their breathing while expressing contentment. However, if your cat is breathing excessively fast or seems distressed, it may be a good idea to consult a veterinarian to rule out any underlying health issues.
Your cat may be breathing fast after giving birth due to the physical exertion of labor and delivery, as well as the hormonal changes that occur during this time. It is important to monitor her closely and contact a veterinarian if you notice any concerning symptoms or if her breathing does not return to normal within a few hours.
Cats breathe through their nose. When a cat has started breathing heavy and seems like he can not breathe, he needs to see a veterinarian.
They want something, or our attention, or they found something that is not normal
the cat was breathing rapidly for the dog had scared it.
If a cat is dead it will not move no matter what you do to it and it will not be breathing.
normal is usually 3-4. sometimes they can mature faster and have a faster birth rate causing them to have 4-5-6 kittens during a time span
Normal temperature in a cat is 101 to 102 degrees. So that would be subnormal or too low. That could mean shock, etc. Take your cat to the Veterinarian immediately if that is her or her temperature.
A dog and a cat. Let the dog chase the cat, if the cat gets caught, the dog is faster ;^)
Breathing
A pair of lungs.