I found the following and have used a similar recipe that I paid good money for ... and here it is for free! So:

Deer Control

The average deer eats about 5 pounds of greenery each day. Creatures of habit, they revisit the same forage areas often. The following non-toxic recipes will deter the deer, but may need to be re-applied after a heavy rain.
~ Mix one whole egg with a quarter cup of water and mix well. Pour the mixture into a pump bottle and spray it on your plants. This deterrent will withstand light rains because the egg sticks to the leaves.
~ Mix one tablespoon of liquid dish detergent with one ounce of hot sauce in one litre of water and spray directly on plants which deer have been nibbling.
~ For larger volume applications, mix the following ingredients:
..............1 cup milk........................2 gallons water (8 liters)..............2 whole eggs
..............2 T cooking oil.................2 T liquid detergent
..............Pour the mixture into a pump bottle and spray it on your plants.

Eventually, even the most persistent deer will become discouraged and look elsewhere for forage. Once they're in the habit of feeding elsewhere, you may be able to let up on the spraying regimen.

A site visitor offers this suggestion for nontoxic deer control:
"Hang a bar of fragrant soap from a middle branch of a bush to keep deer from eating the leaves. They don't like the smell. The rain and humidity keeps the soap fragrant." Wendy
http://www.eartheasy.com/grow_nat_pest_cntrl.htm

Of course, we've discussed putting out dog hair, having humans urinate, and also putting out moth balls.