The best available at grocery store. We need to restock quickly so buying online isn't an option.
You can feed some plain yogurt to the baby, it can relieve constipation. I make Bulgarian yogurt at home.
My son used to have pretty hard stool, now it's getting soft and easy to pass.
I feed him yogurt, pureed baby food from beech and nut, formula mixed with Gerber rice cereal.
He had runny stool with formula only and hard stool with rice cereal.
The only good solution I have is to add yogurt twice a day. Plain home made yogurt from 2% organic milk.