For over 400 years, fishermen and farmers along the rugged, Nova Scotia coast have fed their pets hand-harvested kelp from the icy Nothern sea waters. They credited their pet's good health to the nutrients found in kelp. The Missing Link Pet Kelp Probiotic formula combines the natural benefits of kelp with probiotics, organic pumpkin and organic flaxseed to help support your dog's digestion, hardiness and overall happiness. For Puppies, Adult & Senior Dogs. Fomulated to Support Digestive Tract Health.