Don't be too hard on yourself. You have every right to be emotional now! It has touched my heart so & I am attached to yr sweet babies from afar. I would come right out & ask, "Do you plan to put these in yr yard having dogs yourself, knowing they are poisonous?". You never know about some people.
Perhaps they want them to sell to someone else for profit?? Plus I know you are emotional in that you would not want this to happen to any dog.