The best way to ensure a success bond is find a local rescue centre that offer boar dating. That way, Bailey can find his own friend and know the bond will work. The most important thing when getting a successful bond is character compatibility. If you go out and buy a new Guinea pig there is absolutely no guarantee that bailey will accept him as his new cage mate.
If you go ahead and do the bonding yourself, then you will find a lot of useful information below on how to do it properly. You always need to make sure you have a plan b when doing a bonding yourself in case it doesn’t work out and You end up with two piggies who won’t live together ie making sure you have two cages.
The other essential thing when keeping two boars together (and you can only keep two boars together, no more than that) is lots of space. Two boars need a large cage to ensure that each pig has enough territory. Too small a cage and it can cause fights. The recommended space for two boars is a 5x2 c&c cafe or equivalent size which is 6ft x 2ft. I attach the cage size guide for more information.
Cage Size Guide
A boar and sow pairing is the most stable so if you were to get Bailey neutered, after a six week wait, you could look for a compatible female for him
I attach some information below
A Comprehensive Guide to Guinea Pig Boars
Bonding and Interaction: Illustrated social behaviours and bonding dynamics
Adding More Guinea Pigs Or Merging Pairs – What Works And What Not?
Boars: Teenage, Bullying, Fighting, Fall-outs And What Next?
Dominance Behaviours In Guinea Pigs