Let's talk tummies! Both of my boys ended up on formula at some point in the first year of life. It was amazing in some ways, but what people usually don't talk much about is how it can affect the stomach (especially gentle formulas!!) and thus babies' temperament. We incorporated a lot of fiber and prebiotics when starting solids, but also found that adding a probiotic helped immensely. We used the drops until we were confident that our oldest could chew the others (they recommend starting around 2 years). On amazon, you can get a 4-month supply of both for $30. I like the limited ingredients and love the affordability of these options! liquid organic infant probiotic | toddler chewable probiotic LTKkids LTKfamily LTKbaby