Most sucess I got with my dogs (CO & CAO) is via e-collars...a pretty penny was spent on them but well worth it...It wasnt because of lack of control I had with my dogs, I wanted a reliable recall which I have now and because I am not walking over a dug up icey yard pulling my dogs in when they flip me the finger while pregnant LOL...When off property the collars are always on but when they are in the yard they come when called instantly with or without the collars on. Great training tool when used properly http://www.gundogsupply.com/dtsyssupspt72.html These are the collars that I got In regards for fencing...I have 6' commercial grade heavy duty chain link...with a top and bottom bar...Bottom bar so they cant dig under and a top bar so they cant push it over and so far no issues...But I dont have 5 acreas fenced Good Luck