Helio-hamster

From Transformers Wiki

Helio-hamsters are animals from the Generation 1 continuity family.

Helio-hamsters are popular attractions at the Cybertron Zoo. Their name implies some connection to the Sun, or at least a sun. They may be kept in zoos because their original habitat is Cybertron's lost sun.

They are confined in cages to prevent them from wandering around. Day of the Machines