Formula switch

Michelle

We have been using Gerber gentle fir probably 3/4weeks. (She’s a month old) she was always really gassy and sometimes fussy after feedings. So we started using Gerber soothe for about 2to 3 days now I’m not sure if this is any better or worse. Should we continue with the Gerber soothe? Is there supposed to be immediate results when changing formulas?