Hi Gretchen
yes yoghurt is good but I personally prefer kefir as it has more probiotic power

(Lifeway or their Greek version, Helios, is best IMO)
If you do use yoghurt, try to get one that is not filled with all the sugar, dyes etc that some of the commercial ones have. They are frequently more of a "treat" than a health product!...rather get something like Stoneyfield Farms