The utility model relates to a drinking device for the animals, in particular to a dosing device which is capable of adding a liquid medicine to drinking water. The utility model provides a metering and dosing device for the drinking water for the animals, which comprises a drinking trough and a drinking pipe which is used for injecting the drinking water into the drinking trough. A liquid medicine storage box is arranged in the device, and the liquid medicine storage box is connected with a liquid medicine pipe which is capable of injecting the liquid medicine into the drinking trough and is provided with a control valve. The device preferentially selected by the utility model is characterized in that the liquid medicine pipe is provided with a metering pump, and the metering pump is controlled by a timer to work. The metering and dosing device for the drinking water for the animals is capable of achieving the goal of injecting the medicine into the drinking water for the animals under the condition of non-manual active interference and is capable of eliminating the defects existing in an independent drenching method generally used in animal husbandry large-scale production.