I have horses, sheep, goats...etc... so I had to fence. I dealt with Bears, Cougars, Bobcats(they wiped out 21 years of d'Uccle breeding) packs of coyotes....etc. In NW Oregon. DH got tired of running out in the middle of the night with the Shot Gun, so we build fence to keep most things out.
Here, it's packs of hunting dogs. I am using Cattle panels with many lines of hot wire with a predator rated charger.
Have two very grumpy turkey hens, that do not like strange things in their pastures and a family of crows to keep the hawks at bay.
None of mine seem interested in flying any where, which is nice.