We have a 4 year old male greyhound, Angus, who has never had a solid poop since he arrived at our door. His farts will burn the hair from your nose. He leaks anal gland fluid ( on our bed...yuck) because we think there isnt enough pressure to evacuate them because of the soupy poop. We have tried Fortiflora ( prescribed by his vet), canned pumpkin, and other prescription medication to help, with NO change at all. So we decided to try Native Pet Probiotic. We weren't expecting much, but OMG, within 24 hours his farts were not even noticeable. We could hear him fart, but there was no smell of rotten fish heads dipped in sulfur and set on fire in a barrel of cow dung. His poops have firmed up and he has stopped leaking anal gland fluid. We are extremely happy, and so is Angus.