Zulu was sold almost addult, and sorry, it was not Yolka but Yasmine.
Oh, what a difficult question, whats the problem, better you ask whats the good characteristics.
What I most see in your breeding are atipical dogs, with atipical chest and weak ligaments, also some cow heel, now with J litter you get also low set ears as gift.
I dont know how you selected such characteristics on your dogs, but they are in the moment, weird.
I will die waiting the non existant working dogs list of Cry Wolf kennel.