About 15 years ago, my sister had a very pretty, slender, female cat that was a straight up savage. She looked like a dainty, delicate lap cat. That was her camouflage. My sister also had a Jack Russell terrier with the memory of a goldfish. He'd annoy the cat, get in her face, insist on playing, and just generally make a nuisance of himself until the cat would light his ass up, sending him screaming in pain. He'd leave the cat alone for a week, forget the painful lesson learned, and do it all again with the same results.
I was at her house one evening and we were sitting outside when suddenly we heard screaming and yelping and painful howling that went on for about 20 seconds. He'd started his nonsense with the cat and this time she cornered him where he couldn't escape, tore into him with everything she had, and wouldn't let him go until she'd made a believer of him. He came running by us dripping blood and still screaming and howling in pain. She absolutely clawed the living hell out of his face and laid his nose open and just generally shredded him. She'd channeled her inner bobcat and it was a life-changing experience for that dog. From that moment on he NEVER messed with her again, and every time she got within 5 feet of him and gave even the slightest twitch, he'd yelp and run. FAFO Fido.