My dog had two surgeries last year for abdominal cancer. In between and for long after, she was on multiple antibiotics. Rather than keep giving her the recommended yoghurt that just seemed to upset her stomach, and after much research, I decided on this probiotic. I love the fact that it is completely natural and it truly has been a godsend. It helped to offset the negative effects of the antibiotics, and one of her vets even recommended to give her a little bit extra of it. I've given it to her since that time, although at the regular dose now. She has a very sensitive stomach, but this keeps it at a minimum.