| 摘要 |
<p>Platform is provided with an opening in which a hollow cylindrical member is mounted. The cylindrical member includes an opening for admitting a small animal to the platform and carries a post on which a dome is rotatably mounted with its encompassing sidewall coacting with the platform to cage the animal. The dome carries food compartments depending to a position closely adjacent the platform. An opening in the bottom of each food compartment permits food to be dropped onto the platform beneath the compartment in a position such that the animal must push against the compartment to rotate the dome and expose the food.</p> |
