Sounds good - but I find it difficult to believe that there are no health issues. ALL the large breeds have some issues. The Berners have issues and the Pyrs have issues so why should the mixing of the two be free of issues. Does not make logical sense. Hybrid vigor - over rated. It is not the hybrid but rather the parent stock which determines the vigor of the offspring. Garbage in Garbage out. Instead of being concerned with the pups - you should be checking out the history of the parents since that is where the source of any problems will be stored. Good luck.