Battling fleas in a very large rural yard

[khan8]

2. just an idea

I've used diatomeous earth (DE) inside with success. I could see how it would be difficult to use on acreage. I would worry about my animals inhaling it too. I wonder if you could smother them? Some kind of organic oil product. I doubt if your animals would want to eat it. I don't know how or if it would sink into the water table.