In a functioning bond, there can only ever be one dominant piggy. Your boys are falling out because they are both trying to be dominant and I’m afraid once they’ve decided that then it never change.
Unfortunately this can happen when they become teenagers, bonds can break down.
You can’t fix their relationship by adding another piggy (it doesn’t even work in sows who can live in herds).
Adding in an older third boar does not mean he would take charge and your two would back down. There would be one of two outcomes -
- Either all three would clash for dominance, they would all fight and the situation would be much worse. You’d end up with three probably injured and separated piggies.
- The other outcome is that the third older boar would be the lowest ranking in the hierarchy (much older boars tend to be more about happy, content companionship than dominance). Your current two would still fight with each other as they still won’t like each other, and it could potentially lead to the third older boar being bullied by them. You would still end up with three separated piggies.
This is why boar trios do not usually work - getting the hierarchy to function is very difficult. It certainly wouldn’t work where two piggies already don’t like each other.
Your only option now that your two boys do not get on is to separate them and have them live as neighbours in side by side cages.
(Two of my boys are the same - they are both too dominant with each other and they now have to live side by side. They are much happier not having to share a cage)
Boars: Teenage, Bullying, Fighting, Fall-outs And What Next?