Dr. Seidel Snacks For Large Breed Pups Are Full-Value Dog Snacks Enriched With Prebiotics And Iron. Prebiotics Stimulate The Growth Of Suitable Bacterial Flora In The Gastrointestinal Tract, Thus Enhancing The Animal’S Natural Immunity. Increased Iron Levels Stimulate Hematopoietic Processes And Collagen Synthesis Being Of Special Importance In Case Of Fast-Growing Large Breed Pup Bones.