Similac Advance & Similac PRO-Advance

Alex • AZ🌵 Married, momma of 2 ❤️

My 8 week old son has drank Similac Advance formula since 2 weeks old! I received a free can of Similac Pro-Advance and also one of the sensitive kind, through the mail after signing up with Similac. Would using these mess with his tummy?

Thanks!