MSDVET

Can Cats Growl. When a cat feels frightened. Yes — cat growling is sometimes a reaction to pain.

Cat Growling And Hissing
Cat Growling And Hissing from perfcats.blogspot.com

It typically occurs when someone is trying to touch your kitty where it hurts. This is the most important thing when a cats growling, “back off.” your cat is telling you (loud and clear) that they need their space from either you or whatever they perceive as a threat. When your cat feels pain, or if it is sick, it is also going to growl.