Even with fencing around your property, if your going to free range expect losses. The fence will help with the dogs, but fox and cats can jump over those. Not sure about where your at but we have Hawks and the like here so fencing won't help in that case either. A predator proof run is the best option for you while you are away. When your home let them out to explore with supervision.Yeah, my goal is for them to free range so ill do my best to try get that to happen but if not ill look at the next option. We have mapped out where we will fence first and then get another lot of chicks. The predators we have are foxes, wild dogs and cats, snakes. So I think we might need a run in the future. But I have loads of friends that successfully free range their chickens. Where we are so ill get some advice too.