Evolutions Probiotic + Superfoods Soft Chews are for dogs over the age of 6 weeks. Prebiotic, probiotics, and digestive enzymes, combined with nutrient-rich superfoods nourish the natural gut bacteria and the intestinal microflora. Bacillus subtilis and Bacillus coagulans probiotics provide a source of live (viable) naturally occurring microorganisms for optimal stomach and intestinal balance. The phytonutrients from the superfoods, along with the wholesome bone broth, provide nutritional support for healthy immune system function.