Yes, you can house multiple tortoises together, but it depends on the species and size of the tortoises. Some species are more social than others and can tolerate living together, while others may become aggressive towards each other. It is important to ensure that there is enough space, hiding places, and resources such as food and water for all tortoises in the enclosure. It is also recommended to observe the tortoises closely to ensure they are not fighting or bullying each other.