Organic method to control garden critters?

I'm looking for an organic way to keep away the occasional rabbit, woodchuck and squirrel that venture through my fenced in yard to have themselves a midnight snack in my vegetable and flower gardens. Any thoughts or ideas would be greatly appreciated. Thanks in advance.
Organic method to control garden critters?
Here are a couple things I have heard...

-Put some hair around the garden

-Place shiney objects around (like scratched cds or cds you don't listen to anymore)

-Pee around the outside edge of the garden

-If you have problems with slugs put a little dish of beer out, they will go for the beer instead of your plants
Reply:May sound strange but mark your territory as in piddle around your patch. The human smell will make many leave you alone, you can try cinnamon or hot pepper but it goes away in a short time, piddling works great in most areas.
Reply:Wal-Mart carries plastic garden fencing that has holes too small for any of those to crawl thru. It comes in 25ft rolls. Just get some poles about 2ft high drive them down and wrap the fencing around them. Secure with wire or bread bag ties. When garden time is over, roll it up and use it next year.
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