(Found on Facebook)
So Something Really Bad has happened, and your hobby garden now needs to be ramped up, because it's going to be one of your prime sources of food for some time to come. No problem, because you've been practicing on the hobby garden, you've got extra seeds, you have the tools and you've got some supplies stashed to make it happen.
So what are you going to do to keep the critters out? Right now, the stuff that the deer or rabbits eat is an inconvenience. In that new reality it may be the difference between survival and starvation.
Well, there are a lot of different sort of physical fencing, but they're expensive and you need a lot of hours of labor to put them up and maintain them, plus spare parts. I've seen some done with fishing line or similar fences done using white woven fabric tapes. I can't testify to how they work, because I haven't tried them, but I do have the materials stashed just in case.
I stumbled across another method, a "liquid fence" recipe. Again, I'm not sure it it works, but at the very least it would probably keep vampires at bay.