Luna's Choice chew sticks with salmon The Luna's Choice Collagen Sticks Salmon are delicious chew sticks with salmon. These sticks are naturally rich in collagen, which helps support the joints, skin, and coat. Chewing on the stick can help clean the teeth and remove plaque. Most rawhide snacks are made from the tough and durable outer layer of the hide, while Luna's Choice collagen snacks are made from the inner layer of the cowhide, making them very soft and tasty. This also makes the snacks easily digestible and safe for dogs. In addition to their tastiness, these sticks are low in calories (343.6 Kcal per 100 grams) and therefore a responsible snack.