Natural casing
Natural casings can provide a pronounced bite and traditional appearance. They may curve during cooking and vary slightly in diameter. Gentle, even heating helps prevent splitting.
Manufactured casings
Manufactured casings create more uniform shape and size. Some are edible and remain on the sausage; others are removed after processing.
Skinless hot dogs
Many mass-market hot dogs are cooked in a casing that is removed before packaging. Their smooth exterior browns readily but does not create the same casing snap.
Avoid unnecessary puncturing
Poking holes can let juices escape. Use moderate heat, turn the dog and stop once heated and browned to your preference.