Has a survey ever been done? That would show true property lines.
I agree 100%.
That fence wouldn't even slow down most medium or large breed dogs let alone the chickens in the photos.
Why is a professional land survey out of the question here? In the USA that is how these things are settled. We have records dating back as long as records exist on the property.
That fence would be a deterrent to keep chickens from crossing but any bantam or LF chicken could very easily jump that fence. Even with clipped wings.
Years ago I fenced in my flock using electrified poultry netting that is 42" tall. My gates are constructed of 48" high braced wood frames to hold 1/2" hardware cloth and the frames are hinged to wood posts. All of my LF chickens flew up to the tops of the gates and jumped out when I first enclosed them.
I clipped the primary feathers of one wing on each bird using the old "it will throw them off balance" malarky. They all jumped out again.
I clipped the primary feathers of the second wing. The majority of them still jumped out including the big line backer rooster. He's no nimble ballerina.
I then clipped into the secondary feathers of one wing of the ones that were still jumping the fence and STILL had 4 out of the 12 that were jumping out!!
So... that little garden fence would be extremely easy for the birds to jump over. Especially all the breeds shown in the pictures. Which are very cool by the way!
I agree 100%.
That fence wouldn't even slow down most medium or large breed dogs let alone the chickens in the photos.