There are no guarantees that you will be able to change your dog's name successfully, especially if they have used the old name for years or all their life. What's more, there are many variables that can alter the effectiveness of the renaming process. Some dogs will take a few weeks, while others will take forever based on reasons beyond your control. For the entire process to work seamlessly, you need to invest time and effort in updating everyone in your household. The process also needs consistency. If there is a slight confusion in training which is inevitable in a household with children, brace for a longer process.