Dominance Normal behavior?

[Jakek]

I have two male guinea pigs in a 2X4 cage. What would be normal behavior? I'm also a little worried about there weights. They are:

2lbs 2 1/2 oz
2lbs 1/4 oz

Please tell me what there no behavior is. If I left anything out just ask me. Thank you.

They don't fight with each other.

 

[LilPig]

Two males will usually rumblestrut and mount every so often but being lazy one minute and then tearing through the cage doing zoomies isn't out of the question. I don't know about the weights, they seem quite normal and if they're not fighting I wouldn't worry. Usually adults are a bit laid back (they're adults right? I am guessing by the weights).
Is there something they're doing that concerns you?

 

[Jakek]

It's normal for there to be one who is dominant right? Because one seems a lot smaller than the other which is normal?

 

[pinky]

My two males are really laid back. I hear them click their teeth once in awhile if the other one bothers them but there is never any mounting or chasing. One is a senior and the other is a neutered male. They eat side by side but don't sleep next to each other. They just sort of coexist together with no fussing. They are also in a 2 x 4 which is fine for them.