Should hopkins have agreed to extra testing against Pascal?

Since the introductory of VADA and with cheaters exposed ala Peterson, Berto, dont get me wrong i admire hopkins accomplishments but could he be on something? Seriously, when Pascal demanded extra testing Hopkins refused and justified by stating its a mind game ploy, but look at it he is 46 years old, he is oldest champion in history a feat no one else has accomplished, is he really still fighting this long and at this level all natural, i have doubts, but who really knows, thoughts?