The best wood for a dog bed would be a durable and non-toxic wood that can withstand the weight and activity of a dog. Hardwoods like oak, maple, or birch are excellent choices as they are sturdy and resistant to scratches. Additionally, these woods do not contain any toxic substances that could potentially harm your furry friend. It's important to avoid using softwoods like pine or cedar as their surface can easily be scratched, leading to splinters or discomfort for your dog.