This cache was placed for C-Mass Geofest 2019
Katy-Cats - fans of Katy Perry. Supposedly Perry came up with the name herself during the Hello Katy tour, which I can believe: she also named her real cat Kitty Purry.
This cache is found as you head downstream from Lake Siog to East Brimfield Lake via the East Branch of the Quinebaug River.