|Release date||28 November 2005 (Update)|
|Removal date||11 April 2016 (Update)|
|Location||Varrock Rat Pits|
|Examine||A fully grown feline.|
Mittens was a white cat that could have been seen fighting rats in the Varrock Rat Pits alongside Treacle. She appeared to be a full grown cat, as the Varrock Rat Pits was only for fully-grown, but not overgrown, cats. She could occasionally be killed by a rat.