I know how to definently find out how to find if he is a CWD or a HD put him in the bath tub and see what he does!! If he swims he is a CWD and if he struggles he is not!! (but make sure the bath tub is filled with water of coarse!)
im gonna tell you straight up that is not a CWD. i had one that was about that same size. they look way dif.