My opinion as well is a high fence is a cage. Some cages are larger than others.

And, for your information deer swim between the islands in and the banks of the Mississippi River. Water does not contain them. It appears cougars are likely swimming it too.

Hunting over a feeder is not the same as a field as most fields are larger than the small area under the feeder. Now, if someone dumps a pile of corn in the field and you set up over that pile, that is different.