Keep the cats separated at first
Exchange bedding so they get used to each other’s scent
Feed them on opposite sides of a closed door
Let them hear and smell each other before meeting
Use short, supervised introductions
Provide separate litter boxes, food bowls, water bowls, and resting areas
Give each cat its own safe space
Reward calm behavior with treats and praise
Keep interactions brief and positive
Increase time together gradually
Never force contact
Interrupt staring, chasing, or hissing early
Use toys to redirect energy
Maintain a consistent routine
Spay or neuter both cats if needed
Consult a veterinarian or behaviorist if aggression continues