1: Pediatrics. 2006 Apr;117(4):e760-8. Links
Rectal bleeding in infancy: clinical, allergological, and microbiological 
examination.Arvola T, Ruuska T, Keränen J, Hyöty H, Salminen S, Isolauri E.

After reading all the posts and looking into this myself, I do think probiotics 
are worth trying.  Here is some "medical" evidence to support my theory.
There is much more on this if you get the Medications and Mothers Milk 
Newletter by Thomas Hale.  Here is the 

link:http://www.ibreastfeeding.com/currentnewsletter.pdf


I have given you the "conclusion" as the whole article is too much for this 
post.

Rectal bleeding in infants is generally a benign and self-limiting disorder. Bloody 
stools occurred irregularly for only a few days during the following months. As 
in a previous report, most infants were exclusively breastfed. In the majority 
of the patients the cause of the condition remains unknown. An association 
with viruses can be seen in some patients. The microbes that commonly lead 
to bloody diarrhea in older children and adults, Salmonella, Shigella, and 
Yersinia, were absent in the present material. The low bifidobacterial numbers 
in fecal samples may indicate a significant aberrance that may provide a 
target for probiotic intervention to normalize gut microbiota. The gut 
microbiota overall seemed stable, because the numbers of major groups of 
microbiota tested did not change significantly between the time of admission 
and after 1 month. Cow's milk allergy among these patients is more uncommon 
than previously believed. Cow's milk challenge is thus essential in infants who 
become symptom-free during a cow's milk-free diet to reduce the number of 
false-positive cow's milk-allergy diagnoses.

PMID: 16585287 [PubMed - indexed for MEDLINE]
 Hope it helps someone out there.

best,
robin

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