I have an enclosed run for my chickens. And the coop is fully enclosed inside of that with a hardware cloth predator apron. There are a lot of reasons I am fence building, the chickens just accelerated the project. I also have a small Papillion that has been attacked by over 10 different dogs in his 14 years. The fence would protect him as well. The biggest reason I am building a fence is because the neighbor with the husky is a creep. He has a camera that looks into my backyard, he comes into my yard to spray "weeds," cut down flowers he doesn't like, and just to "check things out." I don't like this and he has been told off verbally.
you can put a camera too.
I don't know about your country but here it is forbidden to spy on other people's property.