I do not know if anyone uses this, but my oldest zoey she used to get gastrointestinal problems so severe she would get dehydrated and lathargic for days!! Where her good bacteria was bad and ect.... it was horrible it happened probably 4 times last year well...... i started buying this stuff online and added it to her night food 1/8 of a teaspoon its a powder and let me tell you have NOT had a problem with it since!

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Pet Dophilus 2.5 oz (70.5 Grams) (F) by Jarrow Formulas