If 'cousin' refers to genetically related -but not actual relatives within the same species, then cousins could be:
hamsters
rats
guinea pigs
Rodents and Mammals
They are both rodents
Rodents of Unusual Size are the largest and are found mainly in the Fire Swamp of Gilder.
squirrel mouse beaver
Mice are not insects, they are rodents.
Mouse
No, but Hamsters and mice are both rodents
No. Both rodent and mouse are singular nouns. The plural forms are rodents and mice.
Rabbits are not rodents.Rabbits and hares form a separate group known as lagomorphs.
Not for long. Rodents grow quickly and the rat will eventually eat the mouse.
rat flat, mouse house
This question is badly phrased. Do you mean how big can rodents grow? Rodents range in size from the field mouse to the capybara.