I’m in New England and there is not much we can do. I get my lawn sprayed monthly with natural cedar and peppermint stuff to help with it, but even if I used insane chemicals, I would be impossible to keep them out of my yard. I have so much wildlife running around they just get redeposited on a daily basis. I’m talking squirrels, rabbit, chipmunks, groundhogs, deer, and black bears. I just check my legs and my dog every time we come inside. Make sure she is current on Frontline and give her a supplement that helps keep them away.