Does everyone here have a run that has the top fenced off? I have a large backyard and want to protect my chickens but here is the thing. I live in the city. The yards to the left, right, and rear of me have dogs that just run around barking at everything. There are some undeveloped wooded areas several blocks away however. I have never seen a raccoon or possum in our area although lord knows I have seen them dead on the highway so i know they are at least in the city somewhere. Can I just have a fenced off area and be reasonably sure they are safe or do I need to do a "Fort Knox" type of run. I am asking because we are building a much larger run and money is an issue. Thanks for your opinions.