i know titan is growing..and perhaps i am too worried..but i know all about the issues these mastiffs and BP's have. But when titan stretches or gets up, or moves sometimes, i hear this popping noise coming from his rear *not from the boodie lol*** I feed him raw, he does get gluc/chon/msm, ester c, nupro, seameal, prozyme, and a probiotic (all of these get varied not all the same time) Is there anything else i can do for him? I know i need to get prelim OFA's, but i was just wondering for any more information all of you know...more info the better...