Companion Animals

Cat Inter-Cat Aggression in Multi-Cat Households

Inter-cat aggression is a major welfare and relinquishment issue in multi-cat households. Understanding feline social dynamics enables effective management.

Key Facts

Cats are not obligate social animals - social relationships require careful management
Resource competition over food, litter, and resting sites drives most aggression
Vertical space and multiple exit routes reduce competition
Introducing cats gradually with scent swapping improves long-term relationships
Chronic low-level stress from incompatible housemates is often missed by owners

Welfare Considerations

Cats living with incompatible companions experience chronic stress that profoundly affects welfare. Stress-related diseases including feline idiopathic cystitis and over-grooming are more common in multi-cat households with conflict. Careful matching of cats and provision of sufficient resources can prevent most inter-cat aggression.

What You Can Do

Provide one resource per cat plus one spare (litter trays, food stations, beds)
Create vertical space with cat trees and shelving for stress-free retreat
Consult a cat behaviour specialist if you observe chronic conflict between cats