Why Cats Read Space Differently From Dogs
Cats are what behaviourists call a facultatively social species: they can live in groups, but nothing in their evolutionary history required them to. A domestic cat's wild ancestor, Felis silvestris lybica, was a solitary hunter whose territory overlapped with others only loosely, and only when food made it worthwhile. That background shapes everything about how your two cats experience a shared flat. They are not reading the space as a home. They are reading it as a range, and they are mapping it for resources and escape routes before they have decided whether the other cat is a threat.
