Housing for a small pet animal such as a rodent or the like

摘要

A housing includes a base tray and an upper cover. Protrusions are provided on at least one opposing surface of an upper end periphery of the base tray and a lower end periphery of the upper cover. When the base tray is connected on the upper cover, ventilating slits are formed between the base tray and the upper cover. Thus, good ventilation is provided in a manner which allows simple manufacturing of the housing.