Dwarf hamsters don't look much like the big teddy bear hamsters most people are used to. She posted a pic of his little stubby tail. She looks like a little dwarf hamster to me.
It has to be a pet. I think every russian dwarf hamster I have ever known has been mean! Glad you found a friendly one!! It is so cute when the stuff their face full of food or whatever they can get their little paws on!!!