Juzen-taiho-to, a traditional Chinese herbal medicine, is used for patients with anorexia and fatigue in human medicine. In our previous study, a granulated form of Juzen-taiho-to improved vincristine-induced gastrointestinal adverse effects through increasing gastric motility in dogs. However, the effect of Hozen-S, the sweet liquid form of Juzen-taiho-to, on dog gastric motility has not been investigated. Therefore, we examined whether the administration of Hozen-S to dogs affects their gastric motility. To further elucidate the mechanism of the effect of Hozen-S on gastric contraction, we assessed the plasma ghrelin level of the dog. Finally, we assessed the Hozen-S palatability compared to granulated Juzen-taiho-to in dogs and the effect on body weight in dogs. Administration of Hozen-S significantly increased gastric motility, plasma ghrelin concentration, and body weight in the dogs. As a result of the palatability evaluation, these dogs preferred Hozen-S to the granulated Juzen-taiho-to. In conclusion, Hozen-S administration to dogs promoted gastric motility by raising the plasma ghrelin level. Considering these functional and palatability data, Hozen-S might replace the granulated type Juzen-taiho-to and become a prominent traditional Chinese veterinary medicament.