Home made repellant...
Have you tried cracking a few eggs in a blender? top off with water... dump in a sprinkling can... sprinkle over leaves... repeat often.
If you would rather not use blender... just use fork... Add eggs to watering can, stir with fork... then, add water while stirring.
Sprinkle plants.
Deer are vegan... They won't appreciate chicken embryo in their munchies.