3 roborovskis not sure how happy they are?

[flowerfairy]

I bought 3 roborovskis from gumtree recently.

They are all from separate litters and have been together a while, dont know how long. I recently witnessed a few tussels. No sound and no injuries that I can see.

One (Seren) is nearly twice the size of the other two, Daffodil and Maple. I often see Seren and Daffodil but Maple comes out much less than they do.

Between tussels (mainly Seren and Daffodil) they are fine. Sitting and grooming themselves and each other.

I just worry that Maple (who is tiny) is less relaxed than the others and also that if I separate one I may get it wrong and have two left who then fall out.

Advice welcome ...

Had them since 23rd of July this year.