What possessiveness over one spot is really saying
When a cat guards a single chair or sun patch — staring down housemates, swatting passers-by, sleeping there with one eye open — she is usually defending something that meets several needs at once: warmth that moves predictably across the afternoon, a height that feels safe, a texture she loves, a view of the room without exposure from behind. Cats are not being petty or dominant in a human sense; a favoured resting place is a genuine resource in feline economics, and a cat who feels resources are scarce or repeatedly taken defends harder. Note exactly when guarding peaks. A cat possessive only in the sunny hours, or only when a particular dog passes, or only on days she is moved repeatedly, is giving you a solvable pattern rather than a fixed character flaw.
Duplicate the spot before you challenge anything
The most effective first move is not training but interior design. Identify what the guarded place offers — direct sun at a certain time, elevation, a deep soft cushion, distance from foot traffic — and build a second version that matches it as closely as your home allows: a similar cushion on a similar-height stand in the other sunny window, with the same quiet. Seed the new spot before expecting use: treats appear there, a worn item carrying household scent rests there, calm stroking happens there if she enjoys it. Many cats split their loyalty once a true equivalent exists, especially if the new spot is sometimes better — the sun reaches it first, or it is nearer to where you sit and read.
Changing the emotional weather around the original spot
While the duplicate settles in, lower the stakes around the original chair. Stop lifting her off it for visitors unless truly necessary; each forced eviction confirms her belief that the spot must be defended. When people or other pets approach, let good things rain at a comfortable distance — a treat tossed her way as the dog passes calmly teaches that approaches predict bonuses, not loss. Reward any relaxed behaviour near the chair: a yawn, a slow blink, resettling instead of stiffening. If children are part of the picture, give them a clear rule that the chair is the cat's rest place and not a game, because unpredictable grabbing hands are the fastest way to turn mild guarding into a bite that everyone then calls sudden.
When guarding is a pain or health signal
Possessiveness that is new, escalating, or expanding deserves a vet visit before a behaviour plan. A cat who guards one warm spot fiercely may be seeking heat for arthritic joints, and a cat who cannot bear being moved may be protecting a sore back, abdomen, or mouth. Watch for guarding paired with reduced jumping, changed grooming, appetite shifts, or irritability in other contexts, and describe the pattern precisely at the appointment. Lunging, hard biting, guarding food, water, litter access, and multiple resting places together, or guarding directed at a baby or vulnerable person, all raise the urgency — get veterinary input promptly and manage access meanwhile rather than rehearsing confrontations to test whether it happens again.
One calm household response, agreed by everyone
Guarding worsens when responses vary: one person laughs and lets her keep the chair with a fuss and treats on the spot, another drags her off, a third avoids the room entirely. Agree a single script — nobody forces removal, approaches are paired with calm rewards at distance, the duplicate spot gets promoted, and any escalation gets noted with date and trigger. KinsLe Family Sharing can instead give a family member you pick access to her profile, ahead of time spent near that guarded chair.