Introducing new cats to existing cat households requires careful management. Evidence-based introduction protocols reduce conflict and improve long-term welfare outcomes for all cats involved.
The introduction of a new cat to an established cat household is a welfare-critical process that determines whether both cats can live comfortably together or whether chronic stress becomes the norm. Rushed introductions that skip gradual familiarisation stages frequently result in established conflict patterns that are difficult to reverse. The welfare of both resident and new cat must be considered: the resident cat's territory has been invaded while the new cat is in an unfamiliar environment with an unknown conspecific. Providing separate resources for each cat throughout the introduction period and beyond prevents competition from becoming the basis of a negative relationship. Some introductions fail despite best management, and honesty about incompatibility prevents prolonged welfare harm to both animals.