Please reconsider and don’t add a third boar to a bonded pair, not even a baby - boar trios (or more) are a recipe for disaster.
Boars only really work in pairs and we never recommend boar trios due to the fact the chances of it working are very low (fights and separated/single piggies being the outcome). It’s one of the most common failed bondings we are contacted about - boars don’t like to live in trios and a bonded pair of boars dont usually welcome a third piggy being added. They fail due to the fact getting character compatibility amongst a boar trio is very difficult to achieve for the long term.
Boars are territorial anyway which is why they need a large cage (a pair need a 180x60cm cage).
If you try to add a third, you will need to be prepared to have multiple cages and separate the piggies again probably sooner rather than later.
Either the baby will be outright rejected by your original pair (even if you introduce correctly on neutral territory following the correct procedure); Or, he will initially be accepted but once he gets to his teens, the trio will start to break down due to dominance issues and then they will need to be separated.
Not only is the baby not likely to be accepted, either immediately or a little down the line, but attempting it can also break the bond between your original pair, and then you will have three single piggies, three separate cages and all of them refusing to live together again
Aside from the character compatibility issues, space is another factor. The cage sizing for a boar trio far exceeds any normal cage sizing requirements due to boars being more territorial. Any cage would need to cover larger than three square metres/36 square feet - so be bigger than 3 metres by 1 metre. Even then that amount of space would not guarantee a trio to work (character being the vital component) but anything less than that would cause space related fall outs.
If you wish to have more piggies, then you will need to get another separate pair of boars and they need to live a separate cage.
Please don’t allow your friend to bring her pigs over and put them with yours also. These kinds of playdates are not recommended and don’t work. They cause stress to the piggies involved as they go into full bonding mode and try to establish a relationship between them all (Which, assuming your friends piggies are both boars, would never work anyway). Doing so can risk the relationships bonds between the two pairs - both you and your friend could have found your own piggies falling out
When you have a stable boar pair, enjoy them how they are and don’t do anything to rock the boat!
Adding More Guinea Pigs Or Merging Pairs – What Works And What Not?
