How TALL a wire fence?
Several years ago I watched a deer jump over a neighbor's 6 foot garden fence effortlessly.
That’s what I had around our garden where we lived before, about 5 feet high. The deer stayed out for years, then started jumping the fence one year. I took 10-foot lengths of 3/4” PVC, drilled the top 5 feet a foot apart, wired them to the steel posts, and ran nylon string through the PVC. Didn’t look great, but it kept the deer out. The string would chafe through in a year or two, but it was easy to replace. I hung streamers on the string the first year and didn’t bother after that.