Although not as frequent, other cat noises include growling and snarling, which often occur alongside hissing. These are low, rumbling and voiceless noises that cats make which indicate aggression or fear. This cat sound occurs when cats are feeling afraid or threatened, to warn the other person or animal to give them space as a way of avoiding a physical fight. Growling cats may also have an arched back, raised fur, or be in a crouch posture, ready to attack. Sometimes cats may also growl when they’re in an unfamiliar environment, such as visiting the vet, in which case the cat noise would represent anxiety or discomfort. It’s important to recognise your cat’s sounds so you can identify when there is a change. If your cat’s vocalisations change in type, frequency, or intensity, there could be ongoing stress, discomfort, or health issues. If the sounds persist, it’s crucial to consult a veterinarian to rule out, detect, or manage any mental or physical health conditions - particularly if your senior cat’s behaviour changes.