The 31-year-old showed the kitten to her fans on micro blogging site Twitter, with a series of snapshots.
Along with the snaps she wrote, "Meet Mercy. Who doesn't love a little white pussy?"
Kardashian referred to the pet as "my new baby Mercy" and was later spotted with the animal at her Dash boutique in Miami, reported Aceshowbiz.
The socialite reportedly named the animal Mercy after her boyfriend Kanye West's new song.