"Ruined furniture" refers to furniture that is damaged, destroyed, or no longer usable due to different reasons like wear and tear, accidents, or neglect. Full definition
Q: I just got a kitten, and I want to make sure she doesn't ruin my furniture or carpet by scratching it. (drmartybecker.com)
Setting up multiple scratching posts provides the cats with an acceptable place to leave their mark without ruining furniture or carpet. (petpeoplestores.com)
It is in this crucial stage where discipline should be enforced so they don't develop a lifelong habit of ruining furniture and other items with their mouths. (puphow.com)