I was struck by these posts because I would treat each of them the same.
 Both mother's probably are over-producing.  Babies digestive systems are
reacting to the strain of high-lactose over-feeding (too much or too rapid
consumption of foremilk.)  I think the spitting up is probably a less-severe
manifistation. While a messy laundry problem, spitting-up eliminates the
stress created if things were going all the way through and irritating the
infant's gut (Regina's case.) Kathy's advice to put the baby more up-right at
the beginning of a fed, allowing baby to come off during let-down, etc. are
good ideas. Reassure that the spitting-up baby is just letting off pressure
(look at her face when she does, if she isn't upset, in pain, etc. then don't
worry about it.)  After she "blows" put her back on the same breast when
she's ready.  She'll have quicker access to creamier, easy to digest milk,
and it will stay down.  I'd def. go to a one breast per feeding period
regimen.  Why bother will meds if this works?

Regina's baby may have allergies as well, time will tell.  But I have seen
blood in stools resolve in 5 cases I have personally worked with (and Michael
Woolridge told me the same) when mother goes to one breast per feeding period
regimen.  This means, designate one breast usage for a period of time:
 anywhere from one to 4 hours.  Baby feeds on demand, but during each feeding
period only uses one breast.  Mother releases a bit of pressure from other
side if need be, but doesn't over-stimulate.  If this plan works, it ususally
works pretty quickly -- within a week improvement will show.  I'd probably
keep mother off dairy, but that diet she's on is a  terrible disincentive and
will result in weaning if continued
Barbara Wilson-Clay, BSE, IBCLC
priv pract, Austin, Tx.