Hi, my 15month LO started fresh cow's milk for the past few weeks & I notice she having hard time to poo & it's really hard poop. Question is does it means she is not suitable for cow's milk? Should I switch to FM or what's the alternative?

The problem of constipation developing right after changing from formula to whole cow's milk is a very common problem. To help get the stools soft again, limit the amount of milk baby drinks to no more than 16-24 ounces per day. Cows milk is not like formula or breastmilk, it is a supplement not the only source of food for baby.