Put up a fence and get yourself some animal replant. I use D-ter here in oz and last for 12 weeks (good for birds, rabbits, dogs, cats, roo's, possums, foxes you name it) Just spray it around and your all good (don't spray it on your plants just around the edges of your plot and outside your fence).
In the USA I seen one where they make it of mountain loin urine. It basically creates fear in the animal your having trouble with, and they all stay the fuck away from your plot, yard or where ever your having trouble. If you think about it, what animal is going near anything that smells like theirs a predator around? They just high tail it out of there and generally stay away from the area.
Here's a link to the one I use just to give you an idea-
D-ter
Do your research as there a few good ones on the market. They can be a little expensive but they are a must for anyone guerrilla growing or just growing in the back yard. Even if your trying to keep racoons away from your home. Give it a ago.
Hope that help's you out