Do not date your hamster, it is entirely too young.
If the 1 year old hamster is a syrian hamster DO NOT put another hamster with it. They are hamsters that NEED to be alone. If it is a dwarf, hamster, it might be ok. Dwarf hamsters like having each others company. However, if the 1 year old hamster is not use to other hamsters, it might not go over to well.
Take it to the vet.
Sure, why not!
You don't breed hamster babies until there at least 1 year old
1 year old or 365 days old or 8765 hours old or 525600 minutes old or 31536000 seconds old
A hamster can be sold at 12 weeks old or above, it's usually good to sell them then they're young and not when they're about 1 year old.
For ten months, the hamsters would be around 5 or 6 years old and 1 whole year is about FIFTY years!! 1 actual year is 25 hamster years which means about 14.6 days is one hamster year :D
no because i have a 3 year old hamster named zoey and she moves really good
Your hamster may have mites, so you should take them to the vet and have the vet check.
About a year old
I feel like the correct question would be "is a pet hamster ready for a 9 year old?"
an 11 yr old should get a Syrian hamster