I have recently adopted a pair of French Mastiff pups. Although i was given all the details and information that i need to take care of these pups but still i am having sleepless nights. I want to reassure myself that i know everything i need to know about my pups, specially all the diseases they are prone to and the precautions to prevent them. Tell me all that you know about the health problems they are prone to and the ways to prevent them? Thanks.