[Malarz]

Do you have a rat who likes to groom more often than others?
One of my girls grooms her cage mates all the time, humans too, you just put your hand close to her and she starts. Or she will climb on my shoulder and start to groom my ears and head.

 

[Jess <3]

Dominant rats often groom all of their cage mate, but it's also a sign of affection. One of my girls is also obsessed with grooming. She'll even go as far as to try and groom the inside of my mouth!

 

[kksrats]

One of my girls licks me more than both of my dogs combined. She'll race to my hand and immediately start licking me. I think she also uses it as a bribe to get her out, let her where she's not supposed be, etc. A couple of my other girls like to nibble at my calluses or dry skin.

 

[Malarz]

I would not call Niunia dominant, since she is the tiniest, skinniest of the mischief. Although you never know. She may be a Napoleon of rats!
Let's go with affectionate. Other rats groom each other, but not humans, like Niunia does.