I've just found your videos and watched them (sound turned off). It was really sad seeing pups growing up in quarantine, personally I couldn't have done that no much how much I wanted a particular breed. But otherwise I was starting to think that you really did have their best interests at heart and was prepared to believe that you were just in it for the love of the breed. ....that is until I got just under 3 minutes into the the 8th video and my blood turned cold. Looks very much like you are trying to teach him to be a personal protection dog (for those you haven't seen this - using a riding crop and sleeve to wind up the dog). If you love your dogs please, please stop this kind of training/play. It will end in tears...maybe yours, maybe someone elses's, but likely both. I have no doubt that this is certainly an accident waiting to happen.