A probiotic composition is provided comprising Bacillus amyloliquefaciens strain H57 bacteria that confers health and/or nutritional benefits, including methods of producing and using such a composition. Also provided is a method of treating a 5 probiotic-responsive disease, disorder and condition in an animal and a method of modulating the gastrointestinal flora of an animal, both including administering to said animal a probiotic composition comprising Bacillus amyloliquefaciens strain H57 bacteria.