I'm the owner of Beau Isabeau z Peronowki.
I think that she (and worser Furcas as seen in these photos) bring the tail too curly at
the end and it is not very nice to see. In the bonitation Isabeau take a note (but not a code) about this.
This curly end has nothing to do with dominance or other things, is a way to bring the tail that at rest is straight.
A straight tail should be better, or should be preferable.
On the other side I don't think this is a so terrible fault that can put dogs with this fault out of breeding...you can repair it by compensation,as you can see in this photo :
On close up Last Navarre (straight tail), at right Isabeau (curly tail) and at left their puppy Anastasia (mid-curly tail)

