“Since this is such a new problem I suspect it may be caused by a medical condition possibly neurological.”
Yeah, okay, it’s a freakin doberman.
doofus! Ever owned one? Or been worshiped by a dobby?
I think you meant me. Yes, my sister owned them. I am familiar with the breed. I also know that dogs just do not suddenly become aggressive without cause. Since there is nothing to indicate any kind of abuse or other obvious causes the sensible thing is to find out if a medical condition could be the cause. There are a number of medical conditions which can lead to aggressive behavior. The dog has been a good family pet for 2 years the owners should not just give up on it.