nibbles

[sarahhhh]

I've been working on building a strong relationship with my hamsters, they've come from a home where they didn't have the care they should have.
When I enter my room, one of them always runs to the bars near me. I've started slowly putting my hand against the bars to build up trust. My hands are always clean but she always gives me a really gentle nibble on my fingers.
It doesnt bother me at all and its not necessary to stop her as it doesnt hurt but I just want to check that I'm not putting her through any kind of distress and that shes ok? Any information would be helpful. This is my first time owning any kind of caged animal independently.
Also, she is housed on her own as she bullied my other hamster.