small holes in them about 2 foot apart. Then thread copper coated fence wire that you can purchase at tractor supply through them. Install a electrical fence system used to keep horses and cows in. You will prevent them from getting through. You will need to hang some cloth on the wires so the deer will see the wires at first. But after a while they learn not to touch or run into the fence.

The reason why to angle the fence is that deer jump high but not far. they sort of hop. They cannot clear distance but can jump many feet into the air. By placing the fence at an angle they will not be able to jump over because of the amount of width they need to cover to be successful.

The spaces between the poles can be 20 or more feet, you just need to keep the wire taught and prevent it from grounding out on the soil. If you place one or two near the ground, you will prevent most small critters from getting past as once their nose hits the wire they are gone.