Hey there!

I have 3 feeders albino/norway rats in a 10g. They happen to be all 3 female. They are about small size. For the most part they sleep and eat and walk around now and then. Some times when they are active they "play" around with each other, I'm not sure how to describe it. Like they are fighting but not really, at least it doesn't look like it yet. They will do it for a few seconds then stop, sometimes even lick each other and stuff.

I'm just wondering is this normal?

Thanks!