chicken wire is your best bet.

dig a trench thats a spade deep and post holes. place fencing into the trench and backfill, this will stop rabbits/voles/moles entering the patch. deer can be a pain they love the fresh new shoots and seedlings.

once you have the wire fencing around the plot you need too think about covering the top. deer will reach over an pluck away. a couple of sheets of chicken wire over the top of you fencing will help. plastic rip ties work well holding chicken wire together and over the top of the plot.

raised beds will also help keep the rabbits/hares/voles/mice/rats/moles away from the veggies.

other way is making a chicken wire cage and placing over the most attacked seedling/plants.

hope this helps you a bit

Tamzi