Preheat the smoker to a temperature of 225-250°F (107-121°C).
Remove hotdog from the fridge, discard any wrappings.Place on a board or hard surface.
Use a sharp knife and score dog by creating an x on the dogs , this is an additional step but it helps in allowing the smoke and seasonings to deeply flavor the hotdogs.
Slather yellow mustard all over the hot dog , then season with cajun seasoning, I used homemade salt free seasoning (see notes), optional step.
Place the hot dogs on the smoker's grates, leaving some space between each dog for proper airflow and smoke circulation.
Close the lid of the smoker and let it cook for approximately 45-60 minutes. The cooking time may vary depending on the size and thickness of the dog.
Once the hot dogs are cooked , remove them from the smoker and let them rest for a few minutes .
Serve the smoked hot on hot dog buns, accompanied by your favorite toppings and condiments such as onions, mustard, ketchup, and /or sweet relish.