All the undesirable traits of the first generation hybrids have been bred out through selective and successful breeding. The Czech Vlcak is essentially a GSD bred to resemble a Carpathian Wolf. But its NOT a wolf; its a domestic dog and is not considered a wolf-dog hybrid.I just do not get the Czech attempts at wolf dog hybrid.
The experiments took place at a government facility for border dogs . A co-operative of selected breeders "commissioned" to produce dogs for border control , under the common name Pohranicni Straze.
In the early to mid 50's breeding was done with a Carpathian wolf mating (s) .
As stated before in the early 90's I met a young man who was a trainer in the facility . He showed me his photo album with the containment pens of the Czech Wolf dog directly behind his on site residence which was provided for him.
He said they were lightning fast, very reactive, unreliable , had a large shy streak , more defensive / avoidance than pro-active active aggression, independent . Not "dog" .
Pre-dating this was the experience of Anton "So" Eiselen and von Stephanitz when the Phylax Society wanted to use wolf blood input to fix certain physical attributes , particularly the sharp attractive look of the p rick ear .
This look was commercially in demand by the wealthy who fancied the idea of being able to "own" a piece of the wild.
Herding dogs which were indigenous to the area had a variety of body type , hang ear , ruff coat, larger bulky body, racy leggy body. They wanted physical uniformity.
The experiments did not work and corrective breeding over several generations had to be done.
In the von Stephanitz book he says there is no reason to introduce more , or any wolf blood - there is nothing to be gained by it.
Vlcaks came up in another discussion.
On one breeders web site this is said "the government made an attempt
to cross the working abilities of the German Shepherd Dog with the Usable qualities of the Carpathian Wolf, such as a
tough, weatherproof exterior (coat and build), good health, independence, and endurance"