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rat people are 1-2 feet tall uh. i think theyre evolved to be both agile but also good at burrowing. they live in large colonies and dont really have a concept of personal space and can get anxious if theyre not surrounded by many others and dont touch them often. they live about 50 years generally but this is shorter than possible bc of dangerous environment + fluctuating nutrition
like humans they generally can conceive babys whenever. they have smaller litters of usually 3-2, 1 is not unheard of and more than 3 is very rare. they invest more time into growing, learning and parental care vs churning out as many babies as quickly as possible like earth rats