We have several things that could support something like that - spa, stair rail, and 4 holes that hold an umbrella or volley ball net. I suggested putting low stretchy net around that but husband didn’t like that. He suggests ‘we’ take her on the leash every day and train her to use one area of the yard. She’s 12, has lived in the same house for 10 years (9 and a half with sight) , and still loses the back door despite having a rug trail to it. She’s happy and sweet, but i don’t think that’s going to work.