My dd is 16 months she gets sick very often almost every month or three weeks she gets fever or cold ..my ped says its normal.is it???

Yep: Pretty normal. The average child gets anywhere from 5-8 upper respiratory infections per year in the first three years of life. They get more if they are in day care or if they are in a household with smokers. Interestingly, children in households with pets get fewer upper respiratory infections. Some folks call them "snot nosed kids" for a reason. It's because it's true.