She likes to use rocks to help establish clear dog boundaries, and she relies on durable wood chips for laying paths. (articles.orlandosentinel.com)
This will allow him to socialise with other dogs and teach him the differences between human boundaries and dog boundaries when playing. (petsmagazine.com.sg)
Even on a small unfenced property, you should teach your dog the boundaries in a positive manner. (tulsapetsmagazine.com)