Deer eating the leaves of your young fruit trees or your hostas?  Here's maybe the most natural way to keep deer away: by urinating on the perimeter of your yard or around the particular tree or plant you want protected... How you get the urine there is up to you.  A spray bottle works or the male anatomy by cover of night is also very effective..

This natural deer reppelant really works!  We planted a new cherry tree in our yard in Muskoka, Ontario only to have ALL the leaves be eaten by deer! After urinating around the tree a few times, new leaves started growing back and the tree made it through its first summer (albeit with a few less leaves than we would have liked).

The trick about this repellant is to keep doing it especially after it rains.  This isn't a one time cure.