Cats have various nasal sounds, but normally when a cat is close to you, it will purr. You can hear this when you're holding the cat. If you hear a different nasal sound under normal circumstances, it may be sick.
A cat's sudden whimpering doesn't necessarily indicate illness; it could be related to external stimuli.
Cats are most susceptible to respiratory and digestive tract infections. Respiratory infections can cause coughing, sneezing, runny nose, and increased eye discharge; digestive tract infections can cause diarrhea, vomiting, lethargy, and loss of appetite. If your cat exhibits any of these symptoms, it is recommended to seek veterinary care promptly.
