yo baby yogurt & weird Question

Question

Rabbi, Is Yo Baby Yogurt ok for pesach? Vanilla Flavor: pasturized organic whole milk,naturally milled organic sugar, inulin, organic naturalvanilla flavor, pectin, s. thermophilus, l. bulgaricus, l. acidophilus, bifidus, l. casei, l. reuterilive active cultures. peach: same as above take out vanilla flavor add Peach puree,annatto extract, beet juice Also Can we purchase items on your list on chol hamoed pesach or does it all need to be purchased pre Pesach??