How do you know if your baby has a cows milk sensitivity? I've had a couple bowls of cereal today with milk and all day my baby has been spitting up more than usual. I think I'm going to cut cows milk out of my diet for a couple weeks to see if it helps with spitting up. Some days I have a lot of dairy and some days I don't. But I feel like when I do eat it my baby spits up mor often.