What type of collagen casing are used in turkey sausage links?

Turkey sausage links typically use collagen casings made from animal collagen, which is derived from the hides and bones of cows or pigs. These casings are preferred for their ability to hold the sausage mixture well and maintain a uniform shape during cooking. They are also more consistent in size compared to natural casings, allowing for easier production and packaging. Additionally, collagen casings are often easier to handle and can provide a desirable bite and texture in the finished product.