The weaning process, when your baby eats foods other than breast milk, begins at 6 months with solid foods. (webmd.com)
Yes, it's normal for babies to balk the first time (or many times) they try food other than breast milk, formula, or soupy purees. (babycenter.com)
In this instance, my views are in accord with those of conventional organizations, namely that for the majority of babies, four to six months is the right age for beginning foods other than breast milk or formula (that's homemade baby formula, based on raw milk). (nourishingtraditions.com)