Delilah Playful biting is usually softer and accompanied by relaxed body language, such as a loose tail, upright ears, and occasional pauses in the action. The cats might take turns chasing or pouncing on each other. On the other hand, aggressive biting is often harder, with tense bodies, pinned-back ears, and hissing or growling. The cat being bitten might yowl or try to escape. If you see these signs, it's time to separate them and give them space to cool down.