the probiotic is doing its job and my son has not had any issues with rashes anymore. His gut health has improved. However, the probiotic does not dissolve well and it’s very hard to administer. Actually a pain to administer. If your baby doesn’t take to syringe feeding, don’t bother buying this product. It’s the only way you can feed it. I wanted to rate this probiotic 3.5 stars for this reason. After all, what good is any probiotic if you can’t give it to your baby? With that said though, my son does sleep 8hrs on and off (he’s 11weeks). Is it the probiotic or other factors? Who knows.