I have a GSD and I wouldn't use it on him because the people behind us in the s/d have a mix shepherd and chow and they are always getting out of it...I looked into it, cause we have alot of land and I wanted to maybe fence in 3 to 4 acres for Max and maybe the others to run, but they told me it wasn't good for toy breeds and too like someone else said I would be afraid of other animals getting them....
