Thank you very much every body for your help and concern.
Thank to a "French CsV breeder" who refer to a "russian breeder" (who was apparently the one who has sell the two dogs), the wildlife mister really think that those 2 animals are CsV...
End of the story
I'm still arguing against this conclusion...
The person in charge tells me that the most important for them is not the breed but if it was 2 wild animals or nothing more than a dog... The CsV is a dog, so everybody is happy
But he also tells me that many Labrador bite people every years and everybody still likes Labrador...
I'll keep you informed if I can obtain some better news'
Thanks again for your help