Laura running Bunny through the fence
She mentions the fence not being there before, so assuming they were on someone elses land?
And then even Charles acts all put out that someone would put a fence up. If it is on their land, it is their right and nobody elses business..
I cannot imagine someone would waste the money and labor to just put up a fence in a random field.
So here is a news flash, Laura and Pa, maybe the fence was installed to keep people like Laura from trespassing and trampling all over their property.