I had deer and other critter issues here as well. I use a three tiered defense:
1.) I finally got sick and tired of my half-assed efforts over the years that never worked and trying all the dumb supposed solutions out there that also do not work. I put up 7 foot tall fences around the garden areas using steel posts, lumber post extensions, multiple electric fence wire spaced at 12 inches, and
chicken wire at the base to keep the bunnies out. It is designed with the first electrified wire at the top of the
chicken wire in such a way that squirrels will climb the chicken wire and will grab that wire with front feet while they still have their back feet on the chicken wire, thus shorting to ground and tripping the current. The wire combination has also done well at keeping raccoons, skunks, and woodchucks out. The raccoons are heavy creatures and climbers so I ran rebar along the top of the chicken wire for added support and wire tied both together.
It is my understanding that if deer are going to jump a fence they will always want to see their landing spot ahead of time (unless they are panicked). Makes sense to me, so I also place tall poles (full length PVC thinwall pipe sections placed on vertical rebar stakes) inside the fence perimeter with lengths of flag tape at the tops which act as distractions. Winds move the flags and also cause the thinwall pipe to bend and move, I assume this combination of poles, flags, and movement makes for questionable landing spots.
2.) During the
gardening season I inspect the fencelines every other day, and if I see any sign of larger critters like raccoons, skunks, or woodchucks then I set up and bait a minefield of live traps and leg traps in the area showing activity. I have become very successful with this as I have become more experienced. I do not use poisons of any kind for any number of reasons.
3.) I engage in constant, continuous, perpetual population control. The populations of these creatures are out of control due to the near extermination locally of
native wild predators so I engage in active reductions by hunting. I cannot shoot deer out of season in this state, the fencing is my only protection from them. The deer populations are out of control here due to government incompetence and mismanagement but I figure they will disappear pretty fast if a serious food supply crisis occurs, at that point laws will not matter much to people with empty bellies and decent hunting skills.
Any creatures I kill I use to
feed the few foxes and coyotes that are still around (except for the bunnies, which I eat). I welcome these predators, unlike my neighbors who shoot on sight. The way I see it I need more natural, wild predators and fewer neighbors. The carcasses also feed crows, hawks, and bald eagles. I put them far
enough away from habitat that the skunks and other unwelcome omnivores do not get to feed on them.
Gardening is work. Protecting the gardens is a continuous part of that work. The results of my efforts is that I have had zero critter issues in the gardens since the fences have been installed. The fences are ugly but I no longer care about such asthetics. I want functionality so I can reliably produce my food, and the fences meet that criteria.