Dominance Dominance behaviors escalating between 2 boys

[jaymem04]

I have 2 boys that have been together since they were both very young. I introduced them and it went very well (some rumbling and chasing, but that's it), so I put them together. They're about 5 months old now, and they've started to have bigger dominance behaviors than ever. No blood has been drawn yet, but they went from just rumbling to mounting to teeth chattering to lunging and pulling out fur. What could be causing this and is there anything I should do? They're in a 2x4 and have 2 of everything.

 

[bpatters]

Enlarge the cage, make sure all the hideys have two doors, and add one more of everything. And grit your teeth for a year or so until they sort of outgrow it.