Hello,
As at
@rp1993 said, I have several pairs of boars living side by side. I have no issues, just the usual rumble strutting at the bars and a room full of testosterone

But on the whole everyone is very happy living as neighbours.
Introducing a new pair to the room can often cause some rumbling (usually I find mostly from the new pair), but it’s never affected the relationships with my existing pairs. Just be prepared for some bar biting and rumbling until everything settles.
One of my boars can’t be bonded with another (he’s very easily bullied) and loves being surrounded by his male neighbours.
Another thing to think about is not having any toys or hides places where they could jump into the next cage. Mine are well away and I always have C&C grids over the top to stop them jumping over (as mine like to sit on top of hides).
and never ever bring females into the room! I wouldn’t even have females in the house lol.
I’m sure your boys will make great neighbours and love the additional interaction through the bars as mine do. Just give them time to settle
