Agrimoss is a food additive typically labeled by pet food companies as being “a natural prebioticA non-digestible food ingredient that stimulates the growth and/or activity of bacteria in the digestive system in ways claimed to be beneficial to health. ”. In experiments on chickens Agrimoss (in conjunction with the probiotic Bactocell) was shown to increase body weight and reduce the feed conversion ratio (or pounds of food required to gain one pound of animal mass).