Bonding Two new baby piggies not getting along with older one, i have had for two years

Well, the first obvious question is, how large is their cage?

And, I've just come from reading your introduction thread on the two little guys. Sadly, I wish you had read more here before picking them up.

While it can't be said that boar trios NEVER work, it CAN be said that they almost never work. Your two new additions are both well into puberty, and the two had already settled their hierarchy BEFORE you introduced them to Chubby. Now they're trying to work it out again, and they likely never will. Two boars is great, but three just doesn't work. I've tried it myself. Now you've upset the pecking order between the first two, and there's a good chance that they may never get along again as well. You could very well end up with all three pigs not getting along.

Your best bet is to separate the two new guys and keep them on their own, it a 2x5 grid cage, and get a 4th boar for Chubby in a separate cage. You COULD leave Chubby alone in the divided part, but he'd be better off with a friend.

Ditto to @Guinea Pig Papa. If you'd done your homework before you got the third pig, you'd have known that a trio fails about 95+ percent of the time. You can also wind up with three solo pigs, none of which will live with another pig.

I recommend either rehoming the third one, or getting a fourth and having two cages with a pair in each one.