Actually tosamama, here in what we call the "ION" Idaho Oregon Nevada - and even recently documented in Merced and Mariposa counties, California...there has in the last year been a huge uptick in CATTLE RUSTLING. We are not talking a few head but 100's of head go missing. Unfortunately not many cowmen use LGD's (unlike in Spain where Mastin Espanol guard cattle). If they aren't tightwads (and too many are) they hire a range rider, someone who just rides through the stock all the time to keep tabs on them (not easy here when you are talking millions of acres of open range, BLM, deeded land, etc. As for extreme aggressiveness in LGDs......be careful for what you ask for. I have a female Kangal that would - if not stopped by fence - rip someone's throat out. Am I proud of it? Hardly. It is a great responsibility. She is a lamb with me, and my best friend who can handle her. Anyone else is given wide berth. If the walk up to the fence from outside, she practically comes inside out trying to get to them. She has never bit anyone but if provoked or teased, it would be all over, I know this. Same for outside dogs. There is an "a--hole" down the road who's big thrill in life is to drive his pick up truck by my place super slow with his pit bull and a mutt in the back, who of course non-stop bark and race in the truck bed as my dogs hit the fence trying to get at them. He does it on purpose to antagonize my dogs. I have taken to watching for him in the evening when he comes to get his mail from the boxes, and I walk up to my gate like I'm going to open it....evil grin. Of course if my dogs got out with my luck his truck would run over some of them but the ones it didn't would kill those dogs. Again, is this something to brag about, or be seriously responsible about.....I prefer the latter. I know what damage my dogs could inflict if incited and although of course I have peace of mind here for me and my stock, I also must continually keep vigilant to make sure the Kangal does not clear that fence someday. So far, its been good. Unfortunately in this sue-crazy world, you have a dog so fierce that it practically kills someone, can you afford to defend yourself when their family sues you? Think about the big picture.... Yes of course I want LGDs that can stop big predators and I am very confident I have those. But people? Well, I have a Kimber 1911 for that....grin......