Babies and toddlers need the whole milk yogurt, not yogurt made with low fat milk. (They need the high fat concentration for their brain development.) Most of the yogurt prominently displayed at the grocery store is low fat yogurt. But there is whole milk yogurt there too (besides the Yo-Baby brand) if you look for it.... Although, the small containers of Yo-Baby are quite convenient with the smaller appetites of wee ones.
Additionally, my two cents would be to try and introduce a yogurt that is not made with high fructose corn syrup. Natural sugar is better.