A direct-fed microbial for calves formulated to benefit both the rumen and intestinal tract. Tri-Start Jr. contains 20 billion colony forming units (CFU’s) to help stimulate feed intake by improving rumen function and health by establishing microbial populations which helps crowd out pathogens. Live lactic acid forming bacteria, and live cell yeast and fungi enhance the environment of the digestive tract activating the naturally occurring beneficial digestive microbes.