We live in a subdivision, not really close to any woods, and my back yard is 2/3 fenced by my neighbors' chain linked fences. We've lived here 16 years and in that time I've seen 1 possum on the street in front of our house. We have 1 squirrel that has started to visit our bird feeders from time to time. We've had baby rabbits in a nest under our shed, once that I know of. Once in a while I'll see a dog roaming around, usually at night, and my neighbor's cat is out and is frequently in our yard. Other than that, I can think of nothing else, predator wise, that is around here. It is made of 1x2" welded wire all the way around. I don't have any kind of doors on the house yet, but I keep the house pushed far enough inside the run that I think they're safe while inside for the night. Still, I worry about them almost every night. Thoughts?