I want to follow the one food per week guideline to watch for allergic/ intolerance response. But what if baby doesn't like what we've given him? We've tried pear two days in a row now, and he wants nothing to do with it. So do I need to wait five more days before we try something else? Does there need to be many consecutive exposures to a food in order to elicit an adverse response if there's going to be one? Anybody have any info about this?