This has some good info for protecting your birds. I use electric wires around my coops and pens and nothing so far has gotten past them. Good luck and have fun...
http://www.poultrydvm.com/featured-infographic/tips-for-protecting-poultry-from-predators
http://www.poultrydvm.com/featured-infographic/tips-for-protecting-poultry-from-predators