How do you non-lethally get rid of hawks?

I have a house in town. It has a bunch of old growth trees. We used to have Cardinals, Blue jays, Woodpeckers. and squirrels come around. Now we have a couple of stupid hawks picking off the birds and small critters. I know they have to eat but not in my backyard. I also have a small dog that I'm worried about. How do I get rid of the hawks?