When two cats argue over one windowsill, the sill is rarely the real issue — the prized spot usually combines height, warmth, a view, and a route in and out that does not require passing a rival. You cannot persuade cats to take turns fairly, but you can copy whatever makes the spot valuable and offer it twice, which removes the need to win it.
Copy the spot, exactly where the value is
Study what the contested place offers: afternoon sun, radiator heat, height above the dog's reach, sight of the bird table, or simply the cushion that holds a favourite scent. Then install the nearest possible duplicate — a second perch on the same window, an identical bed on the same radiator cover, a matching mat in the same sun patch — close enough that neither cat has to accept a clearly inferior consolation across the room. Cats judge duplicates honestly; a thinner cushion in a draughty corner will be ignored and the argument will continue over the original.
Open up the routes around resting places
Many spot disputes ignite not on the perch but on the way off it, when a descending cat lands face to face with the cat waiting below. Arrange furniture so each prized spot has two ways down, move feeding and water stations away from the base of perches, and avoid placing a new bed in a dead end like the far side of a narrow hallway. If one cat regularly ambushes the other at a doorway or stair turn, add a shelf or box at that pinch point so the passing cat can go over rather than through.
Protect rest and stop refereeing
Never carry one cat away from a spot to award it to the other, and never scold a cat for holding a place it reached first — both moves raise the stakes and teach the cats that spots are worth defending harder. Instead, reward the cat who chooses the duplicate, with calm praise or a small piece of regular food delivered there, so the second spot builds its own positive history. Keep play sessions separate or in open space if wand toys trigger guarding, and give a cat who is repeatedly displaced a private resting option behind a door the other cat cannot open.
Tell guarding apart from ordinary preference
Occasional hissing when a sleeper is startled is normal; daily staring matches, blocking doorways, one cat abandoning the litter or food area, or either cat starting to rest in hiding places like wardrobes or behind washing machines means the pressure is too high and the layout needs bigger changes, not patience. Add resources, spread them between rooms, and if the tension still escalates or anyone stops eating, ask your veterinarian to rule out pain — a sore cat defends its resting place far more fiercely than a comfortable one.
A household where one person keeps moving the duplicate bed or feeding a cat on the contested perch will undo the truce, so KinsLe Family Sharing keeps your spot map and house rules visible to everyone who shares the cats' home.