I'm here, was working today. Thank you for the tag,
@spy9doc
I had two boars, my original ones, Pooper and Sly. They weren't bonded, per se, but they tolerated each other and lived in relative harmony.
Pooper sadly passed away first, and left Sly alone. Sly was a senior boar when Poopy passed, about to turn 5. I had read repeatedly that three boars wouldn't work, but there was pair of three week old baby boars in my area that desperately needed a home and I had to take a chance. I thought that if the babies grew up with their Poppa Pig, that my boys would be the exception. And they were. It was absolute magic and they were all so adorable. For about five months.
Scooter and Punkin hit puberty, and Scooter still adored Sly. He always did and that never changed. But Punkin, as loveable and amazing as he was, wanted to be the boss pig. Sly was elderly, almost blind due to osseous metaplasia, and was generally submissive at this point. At first the bullying was mild, but it escalated, and quickly.
The last straw was Punkin chasing Sly, and actually latched onto Sly's back with his teeth as Sly ran from him, blindly running into cage walls and wooden object. I immediately separated them and Sly spent the rest of his days in an adjoining cage, where he could visit and talk to the boys but Punkin couldn't hurt him.
I'll also point out that Scooter and Punkin, littermates from the beginning, were among the most bonded pigs I have ever seen. From all outward appearances and for the rest of his life Punkin didn't have a mean bone in his body. He loved Sly, right up until his hormones changed. Even in an adjoined cage, Scooter would stand at the bars and visit with Sly, and it was so cool to see. But Punkin would always see that his buddy was forsaking him and he would always come up to the bars, grumbling, and herd Scooter away.
I got lucky. That one incident was the only serious one, and Sly suffered no injuries. It could so easily not have been the case. Guinea pig teeth can inflict major, and often fatal, damage. I've seen it here in other members pigs.
My advice is don't do it. If you have a happy, harmonious pair now, don't risk it.
