W.F. Young offers Pet Kelp Feline—Organic Limited Ingredient Superfood Supplement For Cats, from The Missing Link. Kelp is one of the most powerful natural superfoods, full of key vitamins and minerals, the company states. The limited-ingredient organic formula combines kelp with flaxseed, cranberry and probiotics to support digestion and maintain overall health and well-being in cats. The product uses organic sustainably harvested kelp from the pristine waters of Nova Scotia. Probiotics aid in digestion and support a healthy immune system, while cranberry helps support urinary tract health.