Formula tolerance

Sarah • FTM.KinsleyGrace.09.29.17

what are some signs that baby is not tolerating the formula. we are trying the Aldi Brand. she was on Similac sensitivity and switched due to money. she used to spit up on the Similac but the past feeding she spit up a lot... not vomit but just spit up. she also has some issues with reflux so she is on zantac. what are the signs she needs to switch to a dif formula?