This is one unique product! The Safe Behind Bars Dog Harness has made it possible for me to let my dog run free in our fenced in backyard without worrying he will get through the pickets. We spent a fair amount of money getting our fence installed and I was so excited to let Tommy roam the backyard. After about two weeks of freedom, however, Tommy figured out that he could squeeze through the open slats. I never thought this would happen when picking out a fence for our yard and a small dog. I came across your safe behind bars dog harness while doing a search on google. It has been 3 months and there is no way Tommy can get through the openings at the fence. I have enjoyed watching him try over and over again, but he finally gave up and is happy staying put in the back yard where he belongs.