Cats are facultatively social but fundamentally territorial animals. Multi-cat households frequently create chronic social stress when resource distribution and introductions are poorly managed.
Multi-cat household welfare is chronically underestimated because chronic low-grade social stress in cats is largely invisible. Owners see cats sharing space without obvious fighting and conclude that the cats are getting along, while the cats may be experiencing daily resource competition, territorial anxiety, and social suppression that significantly compromises their welfare. The welfare-positive multi-cat home requires more than physical space: it requires separate, distributed resources for each cat; a vertical environment that allows individual territory establishment; appropriate introduction and integration protocols for new arrivals; and owner attentiveness to the subtle signs of inter-cat conflict. Cats who cannot be successfully integrated after appropriate introduction may have better welfare outcomes in separate households than in chronic social conflict.