Growling and huffing can both indicate that your cat is uncomfortable or has a problem, but the severity depends on the situation. Growling is usually a warning behavior when a cat feels threatened or scared, which may be caused by pain, anxiety, fear, etc. If your cat growls frequently or is accompanied by other abnormal behaviors, you may need to consult a veterinarian for further examination.
Breathing is a sign of difficulty breathing or airway obstruction in cats, which may be caused by respiratory infections, asthma, allergies, etc. If your cat has severe difficulty breathing, has blue lips, or has other symptoms of shortness of breath, he or she needs immediate medical attention.
In short, whether it is growling or huffing, if the cat appears abnormal or lasts for a long time, it is recommended to consult a veterinarian in time for diagnosis and treatment.
