Oh, that's a tricky one. Dogs can be mischievous and curious, especially when it comes to the scent of Christmas trees. To keep dogs away from the tree, you can try spraying the tree with a bitter apple spray to deter them from getting too close. You could also try placing a baby gate around the tree or blocking off access with furniture. It's also important to keep the tree's water fresh and free from bacteria, which could attract dogs. And don't forget to give your dog plenty of attention and exercise so they're not tempted to chew on the tree!