This time of the year, every year, the deer and elk have a Pharaoh's feast on the the flower gardens of the locals. Nothing seemed to curtail them except the dogs. Last fall I mention this to my dad and he told me the ingredients for repellent.
Add some Bacon & toast and it sounds like a good breakfast.
Mix well pour into a 1 gal. plastic milk jug.
Leave it outside for three days.
Filter out the chunks and spray the liquid on the plants and flowers.
It works, saw it with my own eyes. The Deer came down for lunch and just stood there and stared at the flowers.