Yes I saw the foot, how many feet are you seeing? Is your neighbor bringing the compost in from another source? It could be your neighbor is a contract dumping source for poultry farms.
Does Georgia have a air quality board of some sort? If so that may your next stop. Arrange ahead of time to have the department visit the next time your neighbor brings in a load of waste.
Also take a soil sample to your local AG board to see if more than animal bi-products are being dumped on your neighbors land and if the quantity dumped is allowable.
If you are on a well, take a water sample in for testing to ensure the dumped material is not affecting your well water.