BOULDER, Colo. (AP) - Owners of a facial bar in Boulder believe their window was smashed in response to a sign advertising breast milk facials.

Mud Facial Bar co-owner Elizabeth Stachovic told The Daily Camera that it doesn't look like anything was taken and only the window with the advertisement was damaged.

The window advertisement read "Introducing breast milk facial" next to a picture of a woman. Police say they have no suspects in the Aug. 3 or 4 vandalism.

Mud Facial Bar has offered breast-milk facials at its Chicago branch for some time, but the treatment was only recently added to the Boulder options. Stachovic says the ad has been a conversation starter since the beginning.

She says Mud Facial Bar isn't sure if it will replace the window advertisement.