FILE - In this Sept. 2, 2012 file photo, a dead cow and dead horse, right, that were trapped in floodwaters from Hurricane Isaac, are seen as floodwaters recede in Plaquemines Parish, L

 

              FILE - In this Sept. 2, 2012 file photo, a dead cow and dead horse, right, that were trapped in floodwaters from Hurricane Isaac, are seen as floodwaters recede in Plaquemines Parish, L
FILE - In this Sept. 2, 2012 file photo, a dead cow and dead horse, right, that were trapped in floodwaters from Hurricane Isaac, are seen as floodwaters recede in Plaquemines Parish, La. Hurricane Isaac turned some of the best ranch land in Louisiana into a miles-long pond of blackish and foul-smelling floodwaters. Snakes, birds and a lot of the livestock raised here by a handful of ranching families drowned in Isaac's storm surge, which overwhelmed the weak levees protecting this farm country south of New Orleans. (AP Photo/Gerald Herbert, file)