Here are some tips on how to separate a kitten and cat that are fighting:
1. Clap your hands loudly or make another loud noise to startle them.
2. Use a water bottle to spray them with water.
3. Use a broom or stick to gently separate them.
4. Once they are separated, keep them in separate rooms for a while until they have calmed down.
5. If the kitten and cat continue to fight, it may be necessary to consult with a veterinarian or animal behaviorist for help.