Although this is possible as a diagnosis, it also fits with the
typical signs and symptoms of a baby how is getting milk relatively
low in fat.  The approach would be to increase the fat in the milk.
However, the symptoms you describe hardly justify doing anything.
What's wrong with explosive bowel movements?  Except if you're in the
line of fire?  Stopping stooling for 12 days is normal in exclusively
breastfed babies, though 12 days is longer than average.  Sounds like
the gastroenterologist needs to attend some breastfeeding conferences.

For information, see:

http://www.erols.com/cindyrn/drjack0.htm    or

http://www.bflrc.com/jn_arts.htm

and look under Colic, Compression, How to Know Your Baby is getting
enough.

Jack Newman, MD, FRCPC