How can I tell if my hamster is full grown or still a baby hamster?

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!

Hello, i am assuming you tried to upload a picture but did not succeeded, without a picture i cannot help identifying the problem, please start a new post and make sure you upload the picture properly

Runts frequently have underlying issues, some congenital, in addition to being small. He may catch up or he may fail to thrive. Without a physical exam, it is difficult to say definitively. Consider keeping him separated to prevent bullying or aggression. Make sure he continues to eat and drink. Weigh him frequently to confirm gains.

It looks like a dwarf of some sort; since I don't know the age it is hard to judge size. It will be easier to tell once he is full grown. This article may help you more: ( https://petcentral.chewy.com/how-to-determine-your-rabbits-breed/ )

That is usually not possible and available. There are no genetic tests for it. The only way would be to have her checked by your veterinarian and age can be only guessed unfortunately. Please do not hesitate to contact us again on the forum or by requesting a consultation (where you can post pictures ) if you have any more questions or to discuss it any further.

It is a little difficult to judge based on this picture but if you can see the teeth when the mouth is closed then yes, he will need to have them trimmed. All hamster’s have continuously growing incisors that need to be worn down frequently. If the bite is off then the teeth will no wear properly and they will need to be trimmed. I would recommend having the teeth trimmed by your veterinarian because it can be a little tricky.

Yes, usually after about 2 weeks you can start tohandle them . They can reach sexual maturity between 4 and 6 weeks old so make sure to separate males and females by that time. Best of luck and thank you for using Pet Coach.