How Big Is a Newborn Rat

Baby rats are about 1 ½ inches (3.8 cm) long at birth (not counting the tail), and are pink and hairless. House mice are only about ½ to 1-inch (2.2-3.5 cm) long at birth.

How big is a new born rat?

When they’re born, baby rats’ ear canals are sealed shut. That doesn’t mean they’re completely deaf, but things are definitely muffled. So, once the ear canal opens on day twelve, things start to sound much clearer.

How can you tell how old a baby rat is?

There are four main ways to tell how old a rat is. The color of their teeth, their size, the condition of their coat, and their energy levels, when looked at in conjunction, can give you a good estimate of your pet rat’s age.

Alexander Ross

Alexander Ross

Gaming, Esports & Interactive Media Writer

Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.

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