CHICAGO (CBS) — The latest addition to the Illinois State Police force? A duo of felines, named DUIE and DISPO.

The sisters are therapy cats, and have been cared for at the Springfield Communications Center.

DUIE (pronounced “Dewey”) and DISPO have beautiful badges with their names, and wore their mourning bands after the loss of state troopers, state police said in a Facebook post.

They recently celebrated birthdays.

Today ISP shared a series of pictures of the purr-fect pair on Facebook.