She could be pyr and Sarplaninac but still not sure the coat is fluffy enough. She could be pyr and Aussie for that matter, but I am not convinced she is 100% Pyr. However there is a website that talks about black pyrs so IDK, maybe gray would be an option too. All the ones I have seen are white or white with some patches of other colors.
http://bar6diamondranch.com/lgdsinfobackpyr.html