In article ,
Fred Galvin wrote:

It was a short story, in a magazine or maybe an anthology, probably
from the fifties or sixties.

Cats and dogs originated on the moon. They migrated to earth when
their last big war (cats against dogs) left the moon uninhabitable.
Cats won the war by inventing some kind of ray that made the dogs
stupid, as they remain to this day, the effect being hereditary. Cats
are in telepathic communication, forming a kind of group mind, and
they spend most of their time solving deep problems of mathematics,
philosophy, and cosmology, the only stuff that interests them
nowadays. They have little interest in their human slaves, but
occasionally they intervene in global affairs, preventing wars or
fomenting them (I forget which) for their own selfish reasons. At the
end of the story, the cats terminate the guy who found out about them.


Can't place this one, but am instantly reminded of C'wainer Smith's
wonderful "The Crimes and Glory of Commander Suzdal", with the immortal
tagline "And then came cats!" [1]

Cheers -- Pete Tillman, looking forward to the 'real' answer

[1] for rpca'ers, these were **SPOILER**
..
..
..
force-evolved cat-warriors, bred by Cmdr Suzdal to combat a savage race
of (sort-of human) attack-queers.
--
In "Tracer Shells," 2002, forty-six cats with bright-white
fluron-tipped tails, leap over upturned chairs and tables
(depicting social chaos) in response to rapid bursts of
recorded machine-gun fire. In the darkened space the effect
is startling, the message disturbing, and the method ethically
challenging. --from WHY PAINT CATS?