With Application Wizard you can easily relaunch the Dock application.
Relaunch the Dock
Choose Relaunch Dock from the Special menu.
Use the "Relaunch Dock" keyboard shortcut.
Force the Dock to quit and relaunch it
Display the Special menu, hold the Option key, and choose "Force Quit & Relaunch Dock".
Related topics
Using the Special menu
Customizing the Special menu
Using keyboard shortcuts to quickly perform tasks