A couple of months ago, Ava started biting her nails. I don't know if it was from the stress of moving, boredom or just a habit, but it got pretty bad. She had chewed her nails to half the length and her fingertips were red and painful. Time to stop. I ordered Mavala Stop on Amazon...a couple weeks of "shiny stuff" on her nails and they're almost as good as new. I still catch her once in awhile but it's not nearly as bad as it was.