ve video footage of dogs from my bitchs pedigree,american bulldogs hines type they are used on all sizes of boar some 500 plus,they have cut vesyts on some of the dogs but i have a lot of footage of dogs with no vests or collars all the dogs have excellent movement and have the sense to get their bodie out of the way while still having a grip and not letting go,i also have a lot of footage of dogos on boar i wasnot overly impressed with the dogo most of the ones i saw were only biting with the front teeth although there was a couple of good dogs where as the am bull was biting with a full bite