As a consumer we must not forget that the supplier needs us too.If something is not right with feed or anything we purchase we need to notify them. It is not necessarily expected to be forgotten nor have to drag back such purchase into the store/supplier . Call or revisit ,keep the conversation friendly but firm as consumer has the right to pay and get services agreed upon and should the supplier/store not meet your agreement they will not know that you are dissatisfied if you go terminate association with them and not notify them why you find it necessary to end further business transactions with them. This communication can only help any further transactions for you and/or any other patron.
I did notice, just as human consumable items, the word "Natural "does not always mean Organic. Marketing will push advertisements to the max ,it can be what they can get away with legally. Consumable items for humans ,pets,wild life ,livestock , etc,are at their mercy . We can arm ourselves with knowledge before we "put it in the shopping basket".