RE: Define "High Fence"
High fence is high fence regardless of its original intent. That said, high fences NOT with the sole intent of keeping animals in, probably don’t do so in 100% fashion but some probably do.
After that the acreage within and validity of pursuit is up to the individuals choice as to whether they are cool with hunting under those conditions.
A little more devils advocate….is hunting on one of the smaller Hawaiian Islands = hunting a high fence?