Training to a dog run
We are planning to adopt a dog this spring that will already be housebroken. On occassions when we can't walk the dog, we'd like to train it to use a specific spot in our yard. We have small children and would like to avoid a yard full of land mines ;-) We have a medium sized fenced yard and would like to use an area on the side of our house that's around 6' x 10' for the dog's potty area.
Any suggestions? What surface? Concrete? Pebbles? Bark? How do we train the dog to use it, etc.