A dog and cat standing in the same room is not necessarily a successful introduction. The cat may be frozen, or the dog may be intensely focused. The more useful question is whether each animal can remain comfortable and move away without being followed.
Dogs Trust’s introduction guidance recommends gradual introductions, separate safe spaces and rewarding calm behaviour. Individual history matters: a friendly response to one cat does not guarantee the same response to a new one.
Prepare the room before bringing them together
Give the cat a route to a genuinely dog-free area, including suitable elevated resting places where appropriate. Keep food, water, litter and valued resting spots protected from the dog. Gates and other barriers must suit the animals involved; a barrier that one can jump or push over does not provide the intended separation.
Begin with the introduction plan recommended by a qualified professional or the rehoming organisation. Do not improvise a face-to-face meeting by holding the cat close to the dog’s nose. Restricting the cat’s escape can turn curiosity into fear.
Observe the space between them
During supervised stages, notice whether the dog can disengage and whether the cat chooses to explore rather than simply endure the situation. Keep sessions manageable. Chasing, stalking, repeated lunging or marked distress means the arrangement needs to change, not that the animals should be left to settle it themselves.
A short log can describe distance, duration and behaviour without calling either animal “good” or “bad.” For example: “Dog looked away when called; cat remained on its perch and later left by the clear route.” That is more useful for the next session than “they seemed fine.”
Do not leave them together unsupervised until you have appropriate confidence and guidance for their circumstances. Some combinations need long-term management, and some are not safe to integrate. Ask a vet or suitably qualified behaviour professional for help where there is concern.
The aim is not a photograph of friendship on the first day. It is a home in which both animals can eat, rest and move without persistent pressure from the other.