Chainsaw

"That" he growled "Was a scratch. Do you need a presentation of what true harming is?" He glared at her. He opened his maw and slowly drew his teeth down her stomach, not stopping until he reached a couple inches shy of her tail tip. His tongue explored the tail tip for a moment, then stopped. He placed a paw at the junction of her hind legs and another up the junction of her front, holding her down with firm pressure.

Then, he clamped his jaws down against her feathered tail, biting mercilessly.