Fleas are a part of animal ownership if you have animals and they roam at all. Or if you roam.
It would be far more likely for cattle to get fleas from your animals, than the other way around. If you don't have outdoor animals you're probably the host tracking the fleas in.
There are fox, coyotes, feral cats, semi-feral dogs and lots of other critters (particularly rodents) that carry fleas in rural areas and cities.
By all means, treat your peripheries with diatomaceous earth, but not so much a dog or a cat would be licking it up.
On bodies, of humans and pets, cedar oil is useful. The military uses it for sand fleas, in particular.
A useful thing to help keep down fleas in outside rodents, is to provide them with an insecticide. Cotton balls, sprayed or powdered with a flea repellant, can be stuffed into toilet paper tubes and scattered in the brush. White cotton sticks out, brown toilet paper tubes don't. Rodents will take the treated cotton for nests, or move into the tube, and treat the whole family.
Now for a personal caution. I don't know the law in Podunk, Va. but if you can be identified by name, in a state with right to farm laws (such as my state of Michigan) -you- are the one who can be sued for picking on or slandering "the idiot across the street".
Yes, I grew up on a farm. With cattle - just like many of the neighbors. No one raising cattle will have your flea problem as cattle get treated with insecticides as part of proper animal welfare. No farmer wants a meat or dairy animal to suffer from blood sucking itch inducers.
