When I lived out in the country and had 4.5 acres I NEVER had a lick of trouble with the deer. I had three active dogs at the time and I'm sure that helped. The whole property was fenced. The deer would jump the fence. But they NEVER stopped to eat, just passed right on through. Moles were my big problem. Rabbits a tiny bit of trouble but their populations were kept in check with the coyotes and my dogs.
But here in the burbs the deer and rabbits are so trying!! The rabbits all year and the deer only in winter. But I bought a giant jug of Plantskyd for winter (hubby won't let me use it in summer because he is afraid it will attract too many flies).
Currently I have a skunk that is causing trouble in my iris. S/he is digging in the center of the clumps. Breaking the leaves at the base. But they are large clumps so I think they will be fine. But I'm not happy about the lingering smell!