You have been asked to deliver a major address to the Feed Manufacturers of America on the importance of educating their clientele on the problem of sub-optimal levels of vitamins in feeds. Write the first page of that address. Get my attention! (Careful! Notice the word sub-optimal. This is not about gross deficiency symptoms.) The first line of your address should begin "Sub-optimal levels of vitamins are manifested differently than gross deficiency symptoms ... " The second line should tell me you know what sub-optimal means and the rest of the address should speak to the monetary implications.