Too much of a good thing sniffed

The farmer looked on sown fields with dismay, Be-spotted with tiny holes in despoiled array. Each spot where mice had dug up and eaten. Wheat seeds sown with mice-controls well beaten. The farmer had tried to poison the mice. Tried birds of prey once or twice. Tried cats and smelly scent deterrents, All to no avail to beat the endless recurrence. One night the farmer awoke from fitful sleep. Ah Hah! I have an idea cheap, neat and deep. What if I make the entire field smell of wheat, By spraying the field all over with wheat-oil neat? Sure enough, the over spray with oil worked a treat. The mice dug a myriad of holes with tiny feet, Where their smell, said wheat should be, Only to find all their holes empty, no seed to see. Frustrated, exhausted they paused their paws. Cursed their noses, tricked by the scent-only cause. A wheat field, over-sown with superfluousness, Made their search, dig to eat meaningless.