Real Christmas trees can be safe for cats if they are properly prepared and cared for. However, it is important to keep in mind that some cats may be tempted to chew on or eat the branches and needles of a real tree, which can cause digestive issues and other health problems. To keep your cat safe, you can place the tree in a location that is out of reach of your cat, and consider using a cat-proof tree skirt or barrier to prevent your cat from accessing the tree. Additionally, you should make sure to clean up any fallen needles and ornaments that could be a choking hazard for your cat.