She's beautiful! I love her colouring. My best guess would be a GSD (sable coloured)/Rottweiler mix with maybe some Lab aswell. Though the thickness of her coat is throwing me off, as it doesn't look as though she has much of an undercoat (except on the neck and tail areas), but it could just be the pictures. My Rottweilers were pretty thick in coat, and GSDs have more than Rotties do.