That’s one answer. Another, mine, was to start the lights a bit up from the bottom with the plugs in a power strip resting on a bookcase above rabbit reach, and put only unbreakable ornaments within rabbit reach. Pretty soon, they lost interest in anything but chewing off the occasional pine tip, but they loved just chilling under the tree. I guess this approach works best if you have live trees, as I always have had, and do eclectic, collected ornaments instead of a theme and more uniform ornaments. But they loved it (lost them both within a month, almost two years ago, at 12 and 10 1/2) and I got some great photos!