Recognise Bullying That Never Becomes a Fight
Targeted bullying between housemate cats is often quiet. The cat doing it may never draw blood; instead he stares the other cat down from a doorway, sits in the one corridor to the litter boxes, ambushes her as she leaves a room, or simply walks at her until she gives up her resting place or meal. The victim's side of the story shows in her behaviour: eating hurriedly, toileting in odd places because the route to the box feels unsafe, hiding more, or only coming out when the other cat is asleep. Naming that pattern matters, because waiting for an actual fight means the targeted cat lives under pressure every day in the meantime.
Give the Victim Routes That Bypass the Bully
Map an ordinary day for the targeted cat and find every pinch point where she must pass the other cat to reach food, water, a litter box or a place to sleep. Then duplicate resources so she never has to run that gauntlet: a second feeding area in a different room, water away from the first cat's territory, at least one litter box she can reach and leave by more than one route. Raised resting places and boxes with two exits help her enormously, because a cat who can leave a confrontation rarely has to have one. These changes often reduce tension within days, even before any training begins.
Interrupt the Stare and the Block Early
Learn the preliminaries — a fixed stare, a body positioned deliberately across a doorway, slow following — and interrupt them before contact, with a calm call, a toy tossed away from the victim, or by stepping between the cats without grabbing either. Do not punish the bullying cat with shouting or isolation as a penalty; arousal and resentment make the next encounter worse, and he will simply choose moments when you are absent. Instead, separate them matter-of-factly when you cannot supervise, using the resource areas you have set up so separation feels like a normal arrangement rather than a punishment for either cat.
Rebuild Tolerance at a Distance They Can Manage
With daily life protected, run short sessions where both cats are in the same large space doing something rewarding — eating a good meal or playing with separate people — at a distance where the victim still eats and plays normally. That distance is the honest starting point, even if it is opposite ends of a room or either side of a barrier. Over sessions, reduce distance only while both cats remain loose and able to look away from each other. If the victim stops eating or the other cat fixates, widen the distance again; her willingness to eat in his presence is the most reliable progress gauge you have.
Rule Out Pain and Sudden Change
A cat who begins targeting a housemate after living peacefully together deserves a veterinary check for both animals. Pain, illness or a strong clinic smell after one cat's vet visit can all flip a settled relationship, and a sick cat's changed behaviour or scent sometimes draws aggression from a housemate. If the bullying began abruptly, or either cat's appetite, grooming or litter habits have changed alongside it, have both examined and mention the social change specifically. Medical causes addressed early can restore a relationship that training alone would struggle to repair.
Keep Safe Areas Consistent for Everyone in the House
The arrangement fails when a visitor or family member feeds both cats together for convenience or shuts the victim's extra box away. KinsLe helps hold the layout through Family Sharing, where each cat's safe areas, feeding station and supervision notes can be shared on their profiles, so everyone in the household protects the targeted cat's routes in the same way every day.