That's a good question. I assume it's just over-population. The house and un-attached 3 car garage are surrounded by woods and pasture on one side and corn or soybean fields on the other sides.With that many,, I wonder what they are feeding outdoors to attract that many so close. Pets? Livestock? Birds?
Bird feeders, pet food dishes, livestock feed bins ALL attract wild critters.
They have 2 outdoor cats but no dogs. ( I think they need a good old fashioned outside farm dog! ) No bird feeders, trash is stored in shut and locked garage until disposed of, no livestock in the area. The cats are fed on the back porch twice a day and food bowls then moved indoors. This is a very rural and remote area.
When I grew up 5 miles south of there we always had an outside dog and didn't ever see a coon or possum.