Changing milk too frequently will upset baby’s stomach, especially if they are too young . If samples are far from expiry, suggest that you keep them first. I tried to give different brands of milk to LO when they are about 1yo.
I'm also afriad that baby stomach cannot take it if keep changing. maybe u can try 1-2 brands. if okie, just go buy that brand. then rest of the sample can pass to other fren.
If you switch between Brands frequently it can sometimes upset baby’s stomach...