Wholistic Pet Acidophilus natural and organic probiotic supplement replenishes the good bacteria normally found in the digestive tract. Digestive upsets may occur when the proper balance between good and bad intestinal bacteria is upset due to emotional stress, sickness or physical strain. Wholistic Pet Acidophilus is extremely concentrated so your pet gets a powerful dosage of healthy probiotics. 5 billion CFUs per gram. Simply sprinkle on food.