Hmmm, I have never experienced that either. This is the first GSD I have owned and she is vocal when needed. I have never heard her whine though? If he is inside all the time, I guess you should be thankful, although I think I would want a warning bark if someone were outside. Sorry, I wasn't much help.
Bella - GSD - 12/26/2012
Buddy - Mutt - 3/15/2012