I'm so sorry your baby is having problems. I've been using probiotics for years. I am no expert, by any means, but I do believe not all probiotics are equal. With dogs having a shorter digestive track, some "people" products are not as effective. Some won't survive until they get were they are needed? Also, different brands have different amounts and possibly different strains of bacteria. I have had good luck w/Wholistic Digest-all plus. You only need a 1/4 tsp per cup of food, given with every meal. Website:
www.wholisticpetorganics.com
Sorry I can't be more detailed. I used to be able to recite this stuff easily as I have several allergy dogs. Apparently, my memory has a slow leak.
Good Luck