Even bird-brains know what's good for them

It seems that chicken feed is not as simple as it's reputed to be, the Oppenheimer family have discovered.

News - Environment: Smart chickens weren't be duped by foul play:

Chickens refusing to eat the maize they had been fed has led to the discovery that their feed had been genetically modified to include a well-known weed and insect killer.

Strilli Oppenheimer was recently approached by Dawid Klopper, the head gardener at the family estate, Brenthurst, informing her that her indigenous African chickens were refusing to eat the mealies in the chicken feed bought from a large supplier. Concerned that the birds may be ingesting genetically modified maize, she instructed Klopper to have the maize tested.

The chickens' diet was immediately changed to include organic vegetables, Oppenheimer stopped consuming the home-grown eggs and the maize was sent to the GMO testing facility at the University of the Free State for analysis.