The Collagen chicken rings for dogs are very healthy snacks, rich in collagen, and suitable for medium and large breed dogs. They are an irresistible snack, made with salmon and beef gelatin (a rich source of collagen). Without preservatives or colorants, they are an alternative to other treats and an excellent dietary supplement that also provides great pleasure to your furry friend. Collagen is recognized as an essential component for maintaining joint health and a healthy skin and a shiny, silky coat.