Given the eliminations you've
already made, my “most likely” next guesses would be that she and
her baby have been:
--  inadvertently substituting
meals for breastfeeding (as opposed to slowly adding table foods to
breastfeeding routine)
--   changing nursing pattern,
particularly encouraging baby to sleep apart at night 

or the flip:
--   not understanding that a baby
who is too busy to nurse by day needs to make up for lost time at
night or milk supply will falter
There are many possible scenarios
but I'd try these on since the baby is 9 months.  Many newly
independent and busy 9-10 month olds are too busy to nurse by day and
have a casual plan to make up for it “later.”  And sometimes
“later” doesn't come.  Typically baby is crawling, cruising,
babbling and sampling new foods all day.  If mom is willing to sleep
with baby and nurse all night everyone survives and eventually babies
move on to a new stage.  But sometimes mom is uninterested in nursing
all night.  Sometimes mom is happy baby is sleeping apart and doesn't
consider there is no time to “catch up” on nursing and therefore 
maintain milk production.  I've seen this sort of thing a lot,
particularly when mom is not pumping and the slip in milk production
is slow.  “Suddenly” baby is not nursing but actually there has
been a slow buildup to this point.  (Moms who pump regularly for
separation usually notice right away there is a change.)
Herbs and/or pumping may help but
my money is on the traditional techniques of wooing baby back to the
breast after a nursing strike.  Skin-to-skin, casual nap & night
time at the breast, shared baths, even getting changed in front of
baby and otherwise tempting baby.  It's important for mom to keep it
casual or baby will practice refusal (which becomes a weaning
technique!).  I'm not necessarily worried about ineffective pumping
though pumping would certainly capture and enhance her milk supply. 
You don't say why pumping is ineffective but perhaps she hasn't been
pumping for a while, maybe pumping is sporadic, maybe she needs a
different pump or new parts, maybe she doesn't like
the pump (comfort, sound, symbolism).  She could offer her supplement
at the breast by tube, if baby is willing to take the breast at
relaxed times, and that might be better all around.

I would highly recommend mom attend
LLL meetings or other community gatherings of nursing babes, visit
nursing playgroups and friends, or if she's isolated maybe read
picture books with nursing babies.  An old stack of New Beginnings
can be helpful, or photos of herself nursing if she has some.  Her
child “wants” to nurse at that age so unless something profound
has stopped the milk or child, he won't need tooooo much of a push
over edge.  Just a lot of patience.  He's busy but he may still be
inspired to nurse if other babies are nursing. 

Two weeks pushes the boundaries of
“normal” nursing strikes.  Have you taken a tally of baby's daily
table food intake?  Baby may be tossing back a lot of calories and mom may be unaware (until now, of course) she is guiding a weaning.

Good luck, please update,

Susan Johnson MFA, IBCLCSalt Lake City USAThuwal KSA
----------------------------

Date:    Fri, 18 Dec 2009 06:32:55 -0500
From:    Alex and Marion <[log in to unmask]>
Subject: 9 month old refusing breast

I had a call from a mom who's 9 month old baby has been refusing the breast for 2 weeks, she has been puming but getting very little, No medications, denies increased stress-other than baby waking more,,is menstruating, no pregnancy, but has intensified her exercise. Baby has no signs of illness, is eating solids and taking some formula in a cup {as she was worried} she describes him as very active. She had tried a lot of different things before calling me. She is unsure if the milk supply dropped so he is less interested, or the other way around. Has anyone used herbs at this later stage with success?.

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