Constant issue for us. If they get hungry they will eat anything. There is somewhere a list of "deer resistant"
plants, unfortunately nobody gave the list to the deer. Liquid Fence is the highest rated concentrate that you
mix and spray. Seemed to be working for awhile then I got a little lax in application. Start with once a week for 2 weeks then go every 2 weeks for next 2 months and see how that works. Another option is to search on-line for using Dawn Dish soap with water. I do not remember the mix but it is very specific as too high a concentrate will harm the plants. I hope this helps. I have no neighbor issues so looking at salt load or bird shot for my 20 gauge. Would rather not have to kill them, just deter them. See 6-8 at a time, most days and no, we do not use corn to attract them.
Good luck.