NAF Seaweed Refill Top up your supplies with NAF Seaweed Refill. Ideal for wheat intolerant horses, seaweed has been noted to give animals a healthy, shiny coat with particularly strong hooves for those that have access to it. NAF Seaweed offers a variety of naturally occurring vitamins, minerals and trace elements in order to help support the health and vitally of horses. NAF Seaweed is perfect for horses whom are being feed below the recommended rates of hard feed which can leave your horse nutrient deficient. NAF Seaweed is not recommended to pregnant mares in late pregnancy. The Seaweed is entirely, naturally sourced from off the coast of Scotland.