So I just got two Guinea Pig boys and they are from the same litter. They get along fine and haven't fought at all. And though it is a long shot of my OH letting me get two more, I doubt it would be a long time before he let me, but if I was to get two more I would want to get two females. I would have their cages together, with one on top of the other. My question is would my two boys fight if I did this?

__________________

Is there any way you can have the girls in a separate room?
There is a high chance that the smell of the girls will cause fighting between your boys.

__________________

Good advice. Every chance indeed the boys will fight an dneed to go in seperate cages. I would suggest you get two more boys to prevent this issue and any accidental litters if they escape

__________________
Fairy smiling, smokes cheroot ...
Simply doesn't give a hoot.

Exactly what the other posters have said. they will need to be completely away from each other to prevent fighting.

__________________