Compared to humans baby rats grow pretty fast. However at a young age a lot has to be developed. For example,  rats are not born able to see or hear. They are born with closed eyelids and very small ears. They depend on their mothers for almost everything.She makes sure that they are feed and that they stay alive.
       By about 30 days the baby rats are almost completely developed. By then they usually have full grown ears and can see perfectly. Their tails are quite long, and they sometimes have big ear. They should also be covered in fur and have nails. I think that it would be interesting  to watch baby rats grow.



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