1st time try susu full cream,alergik susu 1y6m

Hi mommies,ada suggestions x utk bby y alergik susu lembu? Ank 1st time try,dlam masa 5 min minum trus timbul biji² di leher mcm ggitan nyamuk.Dan melarat ke muka..syukur dlm msa 1 jam dah reda.Tkut pula nak bagi minum lgi..