Hi Lilee! I have taken probiotics myself for a long time now and figured that he'd get it through my breastmilk. I did see the infants probiotic in my health food store. I've always known probiotics to be good but then I start second guessing myself and wonder if that caused an imbalance somehow. Your post makes me feel better though. I just bought a different kind the other day that has 12 different strains in it. My son has only had one little cold and all it was was congestion when he was 2 1/2 months old that lasted about 2 weeks. Other than that he's never been sick. He doesn't take a bottle but I could give it to him in his sippy cup with water. Thanks for your post!