Complementary food Collagen+ is a chewed snack made with beef gelatin, naturally rich in collagen (50%), a highly digestible protein. Wrapped in a delicious layer of chicken, it is a great alternative to buffalo skin bones. Chewing contributes to the psychophysical well-being of the dog, emotionally satisfying, strengthens the jaw muscles and contributes, through mechanical action, to keeping the teeth clean. For dogs from 4 months of age. Available in different formats.