I know this sounds gross, but put some dog or cat poop at the edges of your vegetable plot. The poop makes the critters think there is a dog or cat in the garden. Only trick is you have to replace the poop every week or so. I have dogs and cats so supply is not an issue. Since I started doing this, not a single four legged critter has come into the patch. Now if I could only find a way around the birds.