Neighbor's dog burrowed a hole underneath the fence separating our yards, killing two chickens and injuring a third. This was my first flock, so I was hit hard to see my birds suffer, then die in front of my eyes. There are four left, including the injured Australorp. I have a .3 acre backyard, and have for the past two years let them free range- they walk themselves into their 4x8x6 coop at night. I know now that I need to protect them more, but don't want to keep them cooped up all the time- that's no life even for a chicken. What would you suggest that would allow these birds to be as free as possible while still protecting them from predators? I don't mind investing in precautionary measures, but don't want to throw money at the wrong solution either. Sometime this summer, I'm hoping to buy more to replace the birds I lost - I'll probably stay under 10 total, if that helps you make a suggestion.