Never let the cats “fight it out.” Cats don’t resolve their issues through fighting, and the fighting usually just gets worse. Interrupt aggression with a loud clap of your hands, spray from a water gun or a burst of compressed air (no noise).
Neuter the cats. Intact males are particularly prone to aggressive behavior.
Separate their resources. Reduce competition between the cats by providing multiple, identical food bowls, beds and litter boxes in different areas of your house.
Provide additional perches. More hiding spots and perches will allow your cats to space themselves out as they prefer.
Don’t try to calm or soothe your aggressive cat, just leave her alone and give her space. If you come close, she could turn and redirect her aggression toward you.
Reward desired behavior. Praise or toss treats to reward your cats when you see them interacting in a friendly manner.
Try pheromones. FeliwayTM, a product that mimics a natural cat odor (which humans can’t smell), may reduce tensions. Use a diffuser while the aggression issue is being resolved.
