Soak hog casing in cold water for 30 minutes to an hour.
Combine turkey, onion, garlic, herbs, salt, and pepper in a mixing bowl.
Flush the soaked casing with water.
Load sausage stuffer with turkey mixture.
Fill the casing with the mixture. Pinch between your thumb and forefinger and twist to form links.
Preheat the pellet smoker to 225°F
Place links on grill grates, making sure they do not touch.
Close the lid and smoke for 2 hours.
Flip and cook for an additional 2 hours or until internal temperature is at least 165°F
Remove from the grill and enjoy as desired.