Some people believe that real Christmas trees are safe for dogs, while others think they are dangerous. It depends on the specific tree and your dog's individual preferences. Generally, real Christmas trees are not toxic to dogs, but they can cause some issues. For example, if the tree is not properly secured, it could fall on your dog and cause injury. Additionally, the needles and sap from the tree can irritate your dog's skin and eyes. Finally, some dogs may try to chew on the tree, which could lead to digestive problems.