We've had our two young boars for three months; they came as a bonded pair and have always seemed happy living together.
There have been a few occasions of fake-humping, always the same boy asserting himself, and these have resolved quickly.
Today, this same boy has spent hours aggressively mounting the other - lots of squealing, a bit of blood on the humpee (from front claws grabbing on rather than deliberate fighting, I think), clumps of hair everywhere, teeth chattering from the poor old humpee, and he's now very subdued and shy.
We've separated them (which was a hair-raising experience!), but I don't know what to do tomorrow.
Any suggestions from more experienced piggers?