You forgot to mention how they claw your furniture and rugs, leave yacked up hairballs lying around, and if they're males....well dang the smell when they spray. Funny story, we had a grown male cat who peed on my work boots out on the porch. I didn't know it at first and was wearing them one day around our young female cat. I would walk through the house and she'd run in front of me a few paces, stop, drop her chest to the floor and stick her rear in the air. Oh the jokes around my house!