[Fusion200]

5 week old babies, the dad was really squishy and cuddly, would sit still in the lap no matter what, and the mom was pretty cuddly too, more active, but she also enjoyed being cuddled, and the line of rats that the breeder was working with were calm, the only one that was slightly active was the mom, but despite of that she still almnost fell asleep being petted.

 

[Lita]

Most babies are going to be pretty active, it's part of being a baby. You really can't tell individual personality till they grow up. I mean you can have an idea but as they grow they'll change and mold into their adult selves, like people. I'd assume if the parents are from a line being bred for calmness and the parents are calm then your more likely to have calm adults.