Source: https://www.amazon.com/TummyWorks-Probiotics-Powder-Dogs-Scoops/product-reviews/B01AY8S1QM/ref=as_li_ss_tl?ie=UTF8&reviewerType=avp_only_reviews&linkCode=sl2&tag=tdt01-20&linkId=4e7a7b922cf9cb082a3a6e2107d2688b