Another option is an electronic motion sensor. I walk my dog around the neighborhood, and she never wanted to go down one specific street. I talked to my husband about it and discovered one of the homes has a motion sensor that emits a high piercing sound in the range of a dog's hearing. It bothers the dog enough to want to get away from the yard it is coming from. I never could hear it, but my husband could and my dog sure did!

I don't know the name of this item, but I've seen it online at stores specializing in dog supplies. It was with electronic barking sensors...which emit the bothersome sound in response to barking.

Good luck!