I have read in different areas that deer will munch on the leaves, but will leave them alone once they get the sap. (I read it on the internet so it must be true!)
I have not seen it for myself, but really do not want to test the theory that they will leave them alone. I would hate to end up with a deer in the freezer that has a black eye.
We are planning to run some type of fencing anyways as we are going to get things ready for 2017 spring garden - I just assume that we will make it larger so we can get all of our plants in the area to "try" to keep them safe from the deer, coons, armadillos, etc.