Canadian Brand. Noah's Ark eggshell powder is a natural source of highly bioavailable calcium to help support strong bones, healthy teeth, muscle function, and overall nutritional balance in dogs and cats. Perfect for raw and homemade diets, eggshell powder provides an easy way to supplement calcium without artificial additives or fillers. Carefully prepared and finely milled for easy mixing, this simple single-ingredient supplement is ideal for balancing boneless meals and supporting healthy growth and mobility.