Dogs are wonderful animals to have as pets, but sometimes, they can also become a nuisance if not trained properly. If you are not a dog owner and want to keep them out of your yard, there are several things that you can do. Make sure that your yard is clear of debris. Dogs love to explore places that look mysterious. You can also buy a security fence on your property.
If you can not afford a fence, try using mothballs to keep dogs out of your yard. Place them around the edges of your yard, around the trees and bushes where you think a dog will urinate. Also you can mix cayenne pepper and red peppers to keep dogs out of your yard. You can find more information here: http://www.stretcher.com/stories/03/03jul14a.cfm
News flash for dog owners...Nobody loves your dog but you. Be responsible and keep the muts on a leash. I bought a yard guard. It emits a high frequency sound that my neighbors dog hates. Runs 24 hours a day. When the dog comes close enough to hear it she immediately turns and goes back home. Wish I had one that worked on the neighbor.