How to Cut a Hole in Glass for a Pet Door | Safe & Easy DIY for Cats & Dogs @thisisbig-o

Want to install a pet door in glass but not sure how? In this clear, step-by-step guide, I show you exactly how to cut glass for a dog or cat door—with close-up shots and expert tips from over 30 years of hands-on experience. Whether you're adding a pet flap to a sliding glass door, fixed panel, or window, this tutorial gives you everything you need: tools, safety tips, and pro techniques for a clean, safe cut and smooth installation.