Castor & pollux dry dog food, organix grain-free senior recipe is a delicious, specially formulated dog food designed to supplement and support health in older dogs. Made primarily with natural ingredients, organix grain-free senior recipe is largely free of unnatural and unnecessary additives. This product is organic and does not contain added colors, hormones, antibiotics, artificial preservatives or grain. Each bag of castor & pollux dry dog food, organix grain-free senior recipe weighs 4 lbs. See label for warnings.