Rx Vitamins Essentials 1 Piece 2.12 oz/60.10g Biotic Powder for Pets, One Size Probiotics are good bacteria that might work to inhibit the growth of potentially harmful bacteria in the digestive tract Rx Biotic Powder product may help address certain symptoms associated with digestive discomfort such as mild diarrhea constipation or vomiting The recommended serving size of one to four scoops daily each container of Rx Vitamins for Pets Rx Biotic Powder should last for about three to 12 weeks Contains fructooligosaccharides which are prebiotics that could potentially work to stimulate the growth of probiotic bacteria in your pets gut