Dang deer, they did that to me one year, the day before I was going to pick. I nearly blamed it on a human because they picked only the pods, leaving the plants themselves alone. Then I saw their foot prints.
This year I've resorted to using Liquid Fence and am please with it. It really has done wonders keeping the deer off plants. (It doesn't seem to deter my resident whistle pig though!)
Thanks for the acorn!
Shoe