Icelandic+ Collagen Puffs: Baked Beef With Lamb Marrow 1.3oz - Delicious and nutrious treats for dogs. Looking for the ultimate combination of a healthy dog treat that packs a flavor punch? Icelandic+ Collagen Small Dog Puffs are the perfect poppable protein treat your furry best friend is sure to love. With just two ingredients, Usa beef collagen and free-roaming lamb marrow, our puff treats are the perfect reward to get tails wagging. Crunchy, tasty, for small dogs of all kinds