Idea Exchange: An easy way to keep patients in the dark Dec 01, 2004 By dvm360.com staff VETERINARY MEDICINE Instead of stuffing towels into cage doors to darken the kennel, we fashion a piece of dark fabric, as shown, to hang on the door. We use thicker fabric to pad the door or to trap heat inside. Dr. Dawn Kaiser Park Rapids, Minn. Hot topics on dvm360Pet Owner 2.0: A dvm360 Leadership Challenge Veterinary issues in 2016: Will this be the year of telemedicine? Top 8 nastiest things to clean at a veterinary practice The 12 days of veterinary client handouts Need a urine sample? Urine luck!