Pollux is a CsV, though we think it's possible there is a little Saarloos in him
So when people ask what he is, his owner generally says "Czech Wolfdog" and I constantly hiss "Czechoslovakian VLCAK!" so Americans don't think he is a hybrid (a common thought - or they just walk by and I can hear them say "oh, yeah, that's definitely a wolf").
Interestingly, I finally persuaded his firefighter to join us at our Schutzhund club (it's only taken me a year to convince him SchH does NOT make a dog aggressive!)... my club members were THRILLED to see silly Pollux, and we all had a laugh --- the VERY FIRST thing he did when he got onto the training field was ANALLY MARK it. Too funny!
He didn't forget a thing - happily playing with our female "helper" and I was relieved that his firefighter now sees what I meant about Pollux enjoying the game and hanging out with the club...