Good posts Fede86 & yukidomari
You two took the words out of my mouth (I completely agree with you, and would have given the exact same answers).
When dealing with wolfdogs, unsocial behaviour (towards other canines and especially of same sex) is quite typical, and absolutely natural behaviour for a wolf.
Wolves are often concidered being pack animals, and therefore incorrectly interpret to be social animals. But the truth is that wolves live in family units, and usually the pack consists of a mother and a father and their offspring from the last couple springs untill they mature and leave the pack to find their own territory & mate.
Of course there will always be exceptions to rules and so it is in this case too; there are some reported cases of more complex wolf pack structures than described above, but those are just that; exceptions and usually occur only under special circumstances.