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How old are my new hairless rats? Help me estimate their age!

Updated On September 23rd, 2025

Pet's info: Small Animal | Unknown - Small Animal | Female | unspayed | 1lb

I just bought two female hairless rats from the pet store and I do not know how old they are. Can you help give me an idea? The pet store told me they were a new shipment meaning they are probably only a couple months old. This is important to me because I know that hairless rats don’t live as long as furry rats. The first two images are of Atlas and the other is of Cupid.

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1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on February 9th, 2018

Hello. Thank you for using Petco Pet Education Center, formerly Petcoach. I agree with the pet store. Hairless rats will be full grown at 5 months of age and these guys appear younger. I would guess they are about 3 months of age. That is the best I can do by just looking at photos. If you want a more accurate age I would suggest you take them to an exotics vet for an in-person examination. They may be able to tell more from the teeth and actual weight. Hope this helps. Best wishes. They are adorable!

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