Aggression Between
Cats in a Multi-Cat Household
When a cat is frightened or startled, its reaction
may be redirected to the nearest available individual or object. In a
multi-cat household, this target may be another cat. Redirected
aggression is swift and intense, and may begin a cycle of persistent
aggressive interaction. The spontaneous eruption can occur between
housemates that previously coexisted peacefully. It may subside within
moments but more commonly, several days or even weeks may pass before
the housemates resume normal relations. Sometimes the relationship
between cats is permanently changed. In a multi-cat household, the
target cat is not necessarily the first victim of the aggressive
outburst, though usually it is. Occasionally, the roles may be reversed
and the aggressor becomes the target cat. After the initial conflict, a
vicious cycle may form between the target cat and its aggressor. In
anticipation of an attack, the target cat typically assumes a defensive,
fearful and cautious attitude, which triggers the attacker's pursuit.
Long after the original episode has passed, the aggressive cat may be
aroused simply by the target cat's hesitation. The dominant cat may
appear to chase the other as a kind of game.
To avoid further problems, separate the cats as
quickly as possible after the first episode. Avoid injury to yourself by
trying to separate one from the other. It is safer to let the tension
subside and then deal with any injury inflicted on the target cat.
Neither cat should be permitted the run of the house. Confine each cat
separately, each with its own litter, food and water for at least 7
days. Wait an extra 24 hours after the time when they both appear calm
and content. Then release one cat at a time to readjust. Extend the
period of confinement by another day if there is any sign of aggression.
Alternate with each cat so that periods of confinement are gradually
briefer and periods of freedom are longer. Eventually, both cats can be
briefly allowed out at the same time, perhaps at mealtime. If there is
any aggression, remove the food and confine the aggressive cat or both
if necessary. Try again later. It can be very helpful to tranquilize
one or both cats during this recuperative period. Both cats are anxious,
agitated and aroused, and anti-anxiety medication, prescribed by your
veterinarian, can help prevent permanent problems. Continue medicating
both cats until neither is disturbed by the other's presence.
