Icelandic+ Beef Collagen Puffs with Cod Skin Treats for Small Dogs. Looking for the ultimate combination of a healthy dog treat that packs a flavor punch? Collagen puffs are the perfect poppable protein treat your furry best friend is sure to love. With just two ingredients, USA beef collagen and wild-caught cod skin, our puff treats are the perfect reward to get tails wagging. Small crunchy bites for small dogs. Sustainably sourced, wild caught Cod skin rich in omega 3s Made in small batches in the USA Available Size: 1.3 oz