2. Kefir. Similar to yogurt, this fermented dairy product is a unique combination of goatâs milk and fermented kefir grains. High in lactobacilli and bifidus bacteria, kefir is also rich in antioxidants. Look for a good, organic version at your local health food shop.ne of the best probiotic foods is live-cultured yogurt, especially handmade. Look for brands made from goatâs milk that have been infused with extra forms of probiotics like lactobacillus or acidophilus. Goatâs milk and cheese are particularly high in probiotics like thermophillus, bifudus, bulgaricus and acidophilus.